An automobile electric drive rear axle locking washer with automatic indexing and a multi-hole die and a machining process thereof

Abstract

The application relates to an automobile electric driving rear axle locking washer automatic indexing punch multi-hole die and a machining process thereof, wherein the die comprises a die upper structure and a die lower structure; the die upper structure comprises a die handle, an upper die plate, an upper backing plate, an upper fixed plate, a guide column, a punching convex die, a discharging rubber and a guide plate; and the die lower structure comprises a guide sleeve, a lower fixed plate, a punching concave die, a lower backing plate, a positioning core, a swing guide limiting plate, a swing plate, a lower die plate, a bearing, a clamping spring, a rotating shaft, a rotating wheel, a hinge shaft, a push block, a cylinder fixing base, a cylinder, a cylinder control valve and a control valve mounting plate. The die adopts the automatic indexing device, the guide column, the guide sleeve and the guide plate and other structures for automatically correcting the gap, so that the production efficiency is increased by 76%, the die service life is increased by 11 times, the product quality is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of mechanical equipment, and relates to a manufacturing die for locking washers, in particular to an automatic indexing and multi-hole punching die for automobile electric drive rear axle locking washers and a processing technology thereof, and more particularly to an automatic indexing and two-time punching technology. BACKGROUND

[0002] The automobile electric drive rear axle is connected with the half shaft through the main reduction assembly, and the half shaft is connected with the rear wheel hub assembly, and the locking washer plays a role of locking the bearing nut, that is, preventing the bearing nut from loosening, which directly affects the connection strength of the half shaft and the rear wheel hub assembly, and thus directly affects the safety and stability of the vehicle during driving. According to the traditional stamping die structure, the guide sleeves and guide columns are directly fixed on the upper and lower die plates, and the gap between the dies is completely controlled by the skill of the toolmaker, so that the manufacturing precision of the die is difficult to guarantee. Since the workpiece plate is thick (that is, the plate thickness is 4.5 mm), and 12 Φ6.5 holes are punched at a time, the punching convex dies are prone to shift during the production process, so that the gap between the punching convex and concave dies is uneven, and sometimes the edges of the punching convex and concave dies are even bitten, so that the height of the burrs of each hole often exceeds the tolerance (the burr of the workpiece punched hole also directly affects the assembly function), thereby causing the product to stick to the die, and the die edge of the punching convex and concave dies needs to be ground and sharpened every 1500-2000 products. In addition, the workpiece plate is thick, multiple holes are punched at a time, and the hole diameter is small (that is, the workpiece material thickness is 4.5 mm, and 12 Φ6.5 holes are punched at a time), and the punching convex dies are broken generally every 3800 products, so that the punching convex dies need to be frequently replaced, which causes the precision of the die to decrease, thereby affecting the service life of the die. Therefore, the quality of the product is always at risk, the production efficiency is low, the service life of the die is short, and the production cost is high. It is necessary to design an automatic indexing and multi-hole punching die for locking washers to improve the product quality and production efficiency based on the consideration of the optimization of the existing production process. SUMMARY

[0003] One of the purposes of the present application is to provide an automatic indexing and multi-hole punching die for automobile electric drive rear axle locking washers, which improves the service life of the die and the quality of the product by designing guide columns, guide sleeves and guide plates to automatically correct the gap of the die, and the die is additionally provided with a cylinder and a rotating device to realize automatic indexing of the product. The automatic indexing and multi-hole punching die is installed on a pneumatic press to automatically index and punch the locking washer in two times.

[0004] The second object of the present application is to design a kind of automatic indexing punch multi-hole die for electric drive rear axle locking washer belt, 24 holes are punched out twice by the same punch die, to replace the traditional automatic feeding and progressive die punch 24 hole process or manual rotation product punch 24 hole process twice, especially the automatic indexing multi-time punch multi-hole process.

[0005] One of the objects of the present application is achieved as follows:

[0006] An automatic indexing punch multi-hole die for electric drive rear axle locking washer belt of an automobile, comprising a die upper structure and a die lower structure, the die upper structure comprising: a die handle, an upper die plate, an upper gasket plate, an upper fixed plate, a guide column, a punch convex die, a stripper rubber and a guide plate;

[0007] The die lower structure comprises: a guide sleeve, a lower fixed plate, a punch concave die, a lower gasket plate, a positioning core, a swing guide limiting plate, a swing plate, a lower die plate, a bearing, a clamping spring, a rotating shaft, a rotating wheel, a hinge shaft, a push block, a cylinder fixing seat, a cylinder, a cylinder control valve and a control valve mounting plate;

[0008] The punch convex die is assembled in the corresponding convex die fixing hole of the upper fixed plate by interference fit, the guide column is assembled in the guide column hole on both sides of the upper fixed plate by interference fit, the die handle is assembled in the die handle hole of the upper die plate by interference fit, the upper die plate and the upper gasket plate are connected with the upper fixed plate by bolts and positioning pins, the guide plate passes through the punch convex die and the guide column by clearance fit respectively, and is movably connected with the stripper rubber, the upper fixed plate, the upper gasket plate and the upper die plate by stripper bolts;

[0009] The punch concave die is assembled in the corresponding concave die fixing hole of the lower fixed plate by interference fit, the guide sleeve is assembled in the guide sleeve hole on both sides of the lower fixed plate by interference fit, the bearing is assembled in the corresponding bearing fixing hole on the upper and lower fixed plates by interference fit, the swing plate is directly placed in the swing limiting groove of the swing guide limiting plate by clearance fit, the positioning core passes through the bearing from the upper by interference fit, then passes through the lower fixed plate and the lower gasket plate by clearance fit, and finally the lower end is assembled in the fixed cavity of the swing plate by interference fit, the lower die plate, the swing guide limiting plate and the lower gasket plate are connected with the lower fixed plate by bolts and positioning pins, the lower end of the rotating shaft is assembled in the rotating shaft hole of the swing plate by interference fit, and the upper end of the rotating shaft is assembled in the rotating wheel by clearance fit;

[0010] The rotating wheel rotates freely around the rotating shaft, the clamping spring is assembled in the clamping spring groove of the rotating shaft, the hinge shaft passes through the rotating wheel and the push block from the lower end, and is interference fit with the rotating wheel and clearance fit with the push block, the piston rod of the cylinder is connected with the push block by front thread, the cylinder body is connected with the cylinder fixing seat by bolts, the cylinder fixing seat is connected with the lower die plate by bolts, the cylinder control valve is connected with the control valve mounting plate by bolts, and the control valve mounting plate is connected with the lower die plate from the side by bolts.

[0011] Further, the swing guide limiting plate of the lower structure of the mold is provided with a 15° swing limiting groove, when the cylinder works, the rotating device rotates the swing plate clockwise around the positioning core and is limited by the lower end surface of the swing limiting groove on the swing guide limiting plate, when the cylinder resets, the rotating device rotates the swing plate counterclockwise around the positioning core and is limited by the upper end surface of the swing limiting groove on the swing guide limiting plate, since the angle of the swing limiting groove on the swing guide limiting plate is 15°, the swing plate rotates 15° around the positioning core, that is, the positioning core also rotates 15°, thereby driving the product to rotate 15° to realize automatic indexing of the mold, the product is uniformly distributed with 24 holes, the included angle between two adjacent holes is 360° / 24=15°, 12 holes of the product are punched out first, then the product rotates 15°, and then another 12 holes of the product are punched out.

[0012] Further, the lower structure of the mold is additionally provided with a rotating wheel, and the cylinder is installed with an inclination to convert the linear motion of the cylinder into rotary motion.

[0013] Further, the upper end portion of the positioning core is additionally provided with two deep groove ball bearings, and the lower end portion of the positioning core connected with the swing plate is provided with a flat square for anti-rotation.

[0014] Further, the guide column and the punching convex mold are fixed on the upper fixed plate, the guide sleeve and the punching concave mold are fixed on the lower fixed plate, and the double-face gap between the guide column and the guide sleeve is 0.08-0.10 mm.

[0015] Further, the punching concave mold is of an inlaid structure and is fixed on the lower fixed plate.

[0016] Further, the guide plate is provided with two guide column holes on both sides matched with the guide column gap, the double-face gap is 0.16-0.18 mm, the guide plate is provided with a convex mold guide hole in the middle matched with the punching convex mold gap, the double-face gap is 0.18-0.20 mm, the guide plate plays a guiding role on the punching convex mold to improve the strength of the punching convex mold.

[0017] Further, the upper fixed plate is provided with a stepped structure and is provided with a Φ52 hole for placing the discharging rubber, so that the height of the punching convex mold can be as low as possible, the fixed height of the punching convex mold can be as high as possible, the strength of the punching convex mold is improved, the service life of the mold is improved, and the discharging rubber has sufficient discharging force.

[0018] The second technical scheme of the application is implemented as follows:

[0019] The processing technology of the mold for punching multiple holes on the automobile electric drive rear axle locking washer with automatic indexing, comprises the following steps:

[0020] Step 1: install the automobile electric drive rear axle locking washer with automatic indexing punch multi-hole die on the pneumatic 100T press, and connect the air cylinder control valve and the air interface of the machine tool through the air pipe;

[0021] Step 2: open the control valve of the air cylinder control valve, the piston rod of the air cylinder pushes out to drive the push block to advance, the push block drives the rotating wheel to advance and rotate at the same time, the rotating wheel drives the swing plate to advance and rotate at the same time, the swing plate drives the positioning core to rotate clockwise until the swing plate contacts the C limiting surface on the swing guide limiting plate;

[0022] Step 3: place the preformed locking washer workpiece after the blanking-punching large hole process on the upper surface of the lower fixed plate and the punch concave die, and use the outer circle of the positioning core to position the large hole in the middle of the workpiece, and use the notch on the positioning core to position the protruding boss in the middle large hole of the workpiece;

[0023] Step 4: start the press, the upper die plate runs downward along with the machine tool workbench, the guide plate is first pressed against the workpiece under the pressure action of the discharging rubber, and then the punch protrusion moves downward to complete the first pre-punching of 12 holes with the punch concave die;

[0024] Step 5: after the first pre-punching of the workpiece, the upper slide of the press drives the upper structure of the die to return, the guide plate discharges the workpiece under the action of the discharging rubber, so that the workpiece can still be in the positioning core, and the punch waste leaks from the lower die and the machine tool lower workbench;

[0025] Step 6: close the control valve of the air cylinder control valve, the piston rod of the air cylinder retreats to drive the push block to retreat, the push block drives the rotating wheel to retreat and rotate at the same time, the rotating wheel drives the swing plate to retreat and rotate at the same time, the swing plate drives the positioning core to rotate counterclockwise, the positioning core drives the workpiece to rotate counterclockwise, until the swing plate contacts the B limiting surface on the swing guide limiting plate;

[0026] Step 7: start the press, the upper die plate runs downward along with the machine tool workbench, the guide plate is first pressed against the workpiece under the pressure action of the discharging rubber, and then the punch protrusion moves downward to complete the second punching of the workpiece, and then the workpiece is taken out by using an auxiliary tool, and the punch waste leaks from the lower die and the machine tool lower workbench, so that the workpiece is completed punching of all 24 holes;

[0027] Step 8: repeat the operations of steps 2 to 7 to manufacture the next workpiece.

[0028] The beneficial effects of the present application are: the die adopts automatic indexing device, automatic gap correction guide column, guide sleeve and guide plate and other structures, so that the production efficiency is improved by 76%, the die life is improved by 11 times, the product quality is improved, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is the main view structure schematic diagram of the mold of embodiment 1 of the present application;

[0030] Figure 2 is the top view structure schematic diagram of the lower mold part of embodiment 1 of the present application;

[0031] Figure 3 is the locking washer structure schematic diagram of embodiment 1 of the present application;

[0032] Figure 4 is the first punching and second punching process diagram of the locking washer of embodiment 1 of the present application;

[0033] Figure 5 is the positioning core structure schematic diagram of the mold of embodiment 1 of the present application;

[0034] Figure 6 is the swing plate structure schematic diagram of the mold of embodiment 1 of the present application;

[0035] Figure 7 is the swing guide limiting plate structure schematic diagram of the mold of embodiment 1 of the present application.

[0036] In the figure: mold handle 1, upper mold plate 2, upper pad plate 3, upper fixed plate 4, guide column 5, punching convex die 6, discharging rubber 7, guide plate 8, guide sleeve 9, lower fixed plate 10, punching concave die 11, lower pad plate 12, positioning core 13, swing guide limiting plate 14, swing plate 15, lower mold plate 16, bearing 17, clamping spring 18, rotating shaft 19, rotating wheel 20, hinge shaft 21, push block 22, air cylinder fixing seat 23, air cylinder 24, air cylinder control valve 25, control valve mounting plate 26. Embodiment

[0037] The present application can be implemented through technical solutions, and the present application can be further described through the following embodiments, but the scope of the present application is not limited to the following embodiments.

[0038] Reference Figures 1 to 7 , an automobile electric drive rear axle locking washer with automatic indexing punching multi-hole mold, the mold is divided into mold upper structure and mold lower structure, the mold upper structure includes: mold handle 1, upper mold plate 2, upper pad plate 3, upper fixed plate 4, guide column 5, punching convex die 6, discharging rubber 7 and guide plate 8, the mold lower structure includes: guide sleeve 9, lower fixed plate 10, punching concave die 11, lower pad plate 12, positioning core 13, swing guide limiting plate 14, swing plate 15, lower mold plate 16, bearing 17, clamping spring 18, rotating shaft 19, rotating wheel 20, hinge shaft 21, push block 22, air cylinder fixing seat 23, air cylinder 24, air cylinder control valve 25 and control valve mounting plate 26;

[0039] The punch 6 is assembled in the corresponding punch fixing hole of the upper fixed plate 4 through interference fit, the guide column 5 is assembled in the guide column hole on both sides of the upper fixed plate 4 through interference fit, the die handle 1 is assembled in the die handle hole of the upper die plate 2 through interference fit, the upper die plate 2 and the upper backing plate 3 are connected with the upper fixed plate 4 through bolts and positioning pins, the guide plate 8 passes through the punch 6 and the guide column 5 through clearance fit respectively, and is movably connected with the discharge rubber 7, the upper fixed plate 4, the upper backing plate 3 and the upper die plate 2 through discharge bolts; the 12 punches 11 are assembled in the corresponding punch fixing hole of the lower fixed plate 10 through interference fit, the guide sleeve 9 is assembled in the guide sleeve hole on both sides of the lower fixed plate 10 through interference fit, the two bearings 17 are assembled in the corresponding bearing fixing hole of the lower fixed plate 10 through interference fit, the swing plate 15 is directly placed in the swing limiting groove of the swing guide limiting plate 14 through clearance fit, the positioning core 13 passes through the two bearings 17 through interference fit from the top, then passes through the lower fixed plate 10 and the lower backing plate 12 through clearance fit, and finally the lower end is assembled in the fixed cavity of the swing plate 15 through interference fit, the lower die plate 16, the swing guide limiting plate 14 and the lower backing plate 12 are connected with the lower fixed plate 10 through bolts and positioning pins, the lower end of the rotating shaft 19 is assembled in the rotating shaft hole of the swing plate 15 through interference fit, the upper end of the rotating shaft 19 is assembled on the rotating wheel 20 through clearance fit, so that the rotating wheel 20 can rotate freely around the rotating shaft 19, the clasp spring 18 is assembled in the clasp spring groove of the rotating shaft 19 to prevent the rotating wheel 20 from falling off, the hinge shaft 21 passes through the rotating wheel 20 and the push block 22 from the bottom and is interference-fitted with the rotating wheel 20 and clearance-fitted with the push block 22, so that the rotating wheel 20 and the push block 22 can rotate freely around the hinge shaft 21 respectively, the clasp spring 18 is assembled in the clasp spring groove of the hinge shaft 21 to prevent the rotating wheel 20 and the push block 22 from falling off, the piston rod of the cylinder 24 is connected with the push block 22 through the front thread, the cylinder body of the cylinder 24 is connected with the cylinder fixing seat 23 through bolts, the cylinder fixing seat 23 is connected with the lower die plate 16 through bolts, the cylinder control valve 25 is connected with the control valve mounting plate 26 through bolts, and the control valve mounting plate 26 is connected with the lower die plate 16 through bolts from the side.

[0040] The lower die part is provided with a cylinder and a rotating device, and the linear motion of the cylinder is converted into rotary motion by the rotating device to drive the product to rotate, so that the product is automatically indexed and punched twice to form multiple holes on the same die.

[0041] The lower mold part is provided with a swing guide limiting plate 14, and the swing guide limiting plate 14 is further provided with a 15° swing limiting groove. Thus, when the cylinder 24 works (i.e. the cylinder piston rod is pushed out), the swing plate 15 is rotated clockwise around the positioning core 13 by the rotating device and is limited by the lower end surface (i.e. the C limiting surface) of the swing limiting groove on the swing guide limiting plate 14. When the cylinder 24 resets (i.e. the cylinder piston rod is retracted), the swing plate 15 is rotated counterclockwise around the positioning core 13 by the rotating device and is limited by the upper end surface (i.e. the B limiting surface) of the swing limiting groove on the swing guide limiting plate 14. Since the angle of the swing limiting groove on the swing guide limiting plate 14 is 15°, the swing plate 15 is rotated by an angle of 15° around the positioning core 13, i.e. the positioning core 13 is also rotated by an angle of 15°, thereby driving the product to rotate by an angle of 15° to realize automatic indexing of the mold. Since the product is uniformly distributed with 24 holes, the included angle between two adjacent holes is 360° / 24=15°, i.e. 12 holes of the product are punched out first, and then the product is rotated by an angle of 15°, and then another 12 holes of the product are punched out.

[0042] The lower mold part is provided with a rotating wheel 20, and the cylinder 24 is installed with an inclination (i.e. the angle between the cylinder and the horizontal is 70°), so that the linear motion of the cylinder 24 can be converted into rotary motion.

[0043] The upper end part of the positioning core 13 is provided with two deep groove ball bearings 17, so as to ensure smooth rotation of the positioning core 13, and the lower end part of the positioning core 13 connected with the swing plate 15 is provided with a flat square to prevent rotation. The guide pillar 5 and the punching convex die 6 are both fixed on the upper fixed plate 4, the guide sleeve 9 and the punching concave die 11 are both fixed on the lower fixed plate 10, and the double-sided gap between the guide pillar 5 and the guide sleeve 9 is 0.08-0.10 mm. Thus, the uniformity of the mold gap is not controlled by the skill of the fitter, but by the machining precision of the machine tool, so as to improve the mold precision.

[0044] The punching concave die 11 is of an inlaid structure and is fixed on the lower fixed plate 10, so as to save the material cost of the punching concave die 11 and make the replacement of the punching concave die 11 easy to be completed without affecting the mold precision (i.e. because the guide sleeve 9 and the lower fixed plate 10 do not need to be replaced).

[0045] The guide plate 8 is provided with two guide pillar holes on both sides to gap fit with the guide pillar 5, and the double-sided gap is 0.16-0.18 mm. The guide plate 8 is provided with a convex die guide hole in the middle to gap fit with the punching convex die 6, and the double-sided gap is 0.18-0.20 mm. Thus, the guide plate 8 not only plays a guiding role on the punching convex die 6 to improve the strength of the punching convex die 6 and thus improve the mold life, but also plays the role of an ejection plate.

[0046] The upper fixed plate 4 is provided with a stepped structure and a hole Φ52 for placing the discharging rubber 7, so that the height of the punching punch 6 is as low as possible, the fixed height of the punching punch 6 is as high as possible, the strength of the punching punch 6 is improved, the service life of the die is improved, and the discharging rubber 7 has sufficient discharging force.

[0047] The Jiangling EV light truck electric drive rear axle locking washer with automatic indexing punch multi-hole die is installed on a pneumatic 100T press according to the installation mode of a general punching die.

[0048] The Jiangling EV light truck electric drive rear axle locking washer is made of 4.5mm thick hot-rolled plate and can be directly used for punching processing of the die with automatic indexing punch multi-hole die after the blanking and blanking-punching large hole process:

[0049] Step 1: Install the Jiangling EV light truck electric drive rear axle locking washer with automatic indexing punch multi-hole die on the pneumatic 100T press, and connect the air cylinder control valve 25 to the air interface of the machine tool through the air pipe;

[0050] Step 2: Open the control valve of the air cylinder control valve 25, the piston rod of the air cylinder 24 pushes the push block 22 forward, the push block 22 drives the rotating wheel 20 to advance and rotate at the same time, the rotating wheel 20 drives the swing plate 15 to advance and rotate at the same time, the swing plate 15 drives the positioning core 13 to rotate clockwise until the swing plate 15 contacts the C limiting surface on the swing guide limiting plate 14;

[0051] Step 3: Place the preformed locking washer workpiece after the blanking-punching large hole process on the upper surface of the lower fixed plate 10 and the punching concave die 11, and use the outer circle of the positioning core 13 to fix the large hole in the middle of the workpiece, and use the notch on the positioning core 13 to fix the protruding boss in the middle large hole of the workpiece (i.e. prevent the product from rotating);

[0052] Step 4: Start the press, the upper die plate 2 runs downward with the machine tool workbench, the guide plate 8 is first pressed against the workpiece under the pressure of the discharging rubber 7, and then the punching punch 6 moves downward to complete the first pre-punching 12 holes of the workpiece (i.e. the workpiece first punches out 12 holes);

[0053] Step 5: After the workpiece is first pre-punched 12 holes, the upper slide of the press drives the upper structure of the die to return, the guide plate 8 is unloaded under the action of the discharging rubber 7, so that the workpiece can still be in the positioning core 13, and the punching waste leaks from the lower die and the machine tool lower workbench;

[0054] Step 6: Close the control valve of the cylinder control valve 25, the piston rod of the cylinder 24 retreats to drive the push block 22 to retreat, the push block 22 drives the rotating wheel 20 to retreat and rotate at the same time, the rotating wheel 20 drives the swing plate 15 to retreat and rotate at the same time, the swing plate 15 drives the positioning core 13 to rotate counterclockwise, the positioning core 13 drives the workpiece to rotate counterclockwise, until the swing plate 15 contacts with the B limiting surface on the swing guide limiting plate 14, so that the workpiece rotates an angle of 15 ° (because the workpiece is uniformly distributed with 24 holes, the included angle between two adjacent holes is 360 ° / 24=15 °, and the swing limiting groove angle on the swing guide limiting plate 14 is 15 °);

[0055] Step 7: Start the press, the upper die plate 2 runs downward with the workbench on the machine tool, the guide plate 8 is pressed tightly against the workpiece under the pressure of the stripper rubber 7, then the punching convex die 6 moves downward to complete the second punching 12 holes (i.e. punching out another 12 holes of the workpiece) with the punching concave die 11, and then the workpiece is taken out by using auxiliary tools, the punching waste is leaked out from the lower die and the lower workbench, so that the workpiece completes the punching of all 24 holes;

[0056] Step 8: Repeat the operations of steps 2 to 7 to manufacture the next workpiece.

[0057] After the Jiangling EV light truck electric drive rear axle locking washer with automatic indexing multi-hole die and its processing technology, the related dimensions such as the burr height, position degree and center distance of each hole of the workpiece are within the tolerance range. And the workpiece is optimized from traditional manual indexing to automatic indexing of the die, the production efficiency is improved by 76%, and the die life is improved by 11 times by using the structure of automatic correction gap of guide pillar, guide sleeve and guide plate, which can continuously and stably ensure that the Jiangling EV light truck electric drive rear axle locking washer meets the design requirements of the product drawing.

[0058] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person having ordinary skill in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0059] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, the scope of the present application is defined by the claims and their equivalents.

Claims

1. An automotive electric drive rear axle lock washer with automatic indexing punch multi-hole die, comprising an upper die structure and a lower die structure, the upper die structure comprising: Die handle, upper die plate, upper backing plate, upper fixed plate, guide column, punching punch, discharge rubber and guide plate; The lower part of the mold structure comprises: guide sleeve, lower fixed plate, punching female die, lower backing plate, positioning core, swing guide limiting plate, swing plate, lower die plate, bearing, clamp spring, rotating shaft, rotating wheel, hinge shaft, push block, cylinder fixed seat, cylinder, cylinder control valve and control valve mounting plate; The punching punch is assembled in the corresponding punch fixing hole of the upper fixed plate by interference fit, the guide column is assembled in the guide column hole on both sides of the upper fixed plate by interference fit, the die handle is assembled in the die handle hole of the upper die plate by interference fit, the upper die plate and the upper backing plate are connected with the upper fixed plate by bolts and positioning pins, and the guide plate is respectively inserted through the punching punch and the guide column by clearance fit, and is movably connected with the discharge rubber, the upper fixed plate, the upper backing plate and the upper die plate by discharge bolts. The punching female die is assembled in the corresponding female die fixing hole of the lower fixed plate by interference fit, the guide sleeve is assembled in the guide sleeve hole on both sides of the lower fixed plate by interference fit, the bearing is assembled in the corresponding bearing fixing hole on the upper and lower sides of the lower fixed plate by interference fit, the swing plate is directly placed in the swing limiting groove of the swing guide limiting plate by clearance fit, the positioning core passes through the bearing from the upper end by interference fit, then passes through the lower fixed plate and the lower backing plate by clearance fit, and finally the lower end is assembled in the fixed cavity of the swing plate by interference fit, the lower die plate, the swing guide limiting plate and the lower backing plate are connected with the lower fixed plate by bolts and positioning pins, the lower end of the rotating shaft is assembled in the rotating shaft hole of the swing plate by interference fit, and the upper end of the rotating shaft is assembled on the rotating wheel by clearance fit. The rotating wheel freely rotates around the rotating shaft, the clamp spring is assembled in the clamp spring groove of the rotating shaft, the hinge shaft passes through the rotating wheel and the push block from the lower end, and is interference-fitted with the rotating wheel and clearance-fitted with the push block, the piston rod of the cylinder is connected with the push block through the front end thread, the cylinder body is connected with the cylinder fixed seat through bolts, the cylinder fixed seat is connected with the lower die plate through bolts, the cylinder control valve is connected with the control valve mounting plate through bolts, and the control valve mounting plate is connected with the lower die plate from the side through bolts; The double-sided clearance between the guide column and the guide sleeve is 0.08-0.10mm; The guide plate is provided with two guide column holes on both sides and clearance-fitted with the guide column, and the double-sided clearance is 0.16-0.18mm, the guide plate is provided with a punch guide hole in the middle and clearance-fitted with the punching punch, and the double-sided clearance is 0.18-0.20mm, and the guide plate guides the punching punch to improve the strength of the punching punch.

2. The automobile electric drive rear axle locking washer with automatic indexing and punching die according to claim 1, characterized in that, The angle of the swing limiting groove on the swing guide limiting plate of the lower structure of the mold is 15°. When the cylinder works, the swing plate rotates clockwise around the positioning core through the rotating wheel and is limited by the lower end surface of the swing limiting groove on the swing guide limiting plate. When the cylinder resets, the swing plate rotates counterclockwise around the positioning core through the rotating wheel and is limited by the upper end surface of the swing limiting groove on the swing guide limiting plate. Since the angle of the swing limiting groove on the swing guide limiting plate is 15°, the swing plate rotates by an angle of 15° around the positioning core, i.e. the positioning core also rotates by an angle of 15°, thereby driving the product to rotate by an angle of 15° to realize automatic indexing of the mold. The product is uniformly distributed with 24 holes, and the included angle between two adjacent holes is 360º / 24=15º. First, 12 holes of the product are punched out, and then after the product rotates by an angle of 15°, another 12 holes of the product are punched out.

3. The automobile electric drive rear axle locking washer with automatic indexing and punching die according to claim 1, characterized in that, The upper fixed plate is provided in a stepped structure and is provided with a Φ52 hole for placing the discharging rubber.

4. A processing technology of automobile electric drive rear axle locking washer with automatic indexing and punching multi-hole die based on the automobile electric drive rear axle locking washer of claim 1, characterized in that, The method comprises the following steps: Step 1: install the automobile electric drive rear axle locking washer automatic indexing multi-hole punch mold on the pneumatic 100T press, and connect the cylinder control valve and the compressed air interface of the press through the air pipe; Step 2: open the control valve of the cylinder control valve, and the piston rod of the cylinder pushes out to drive the push block to advance, the push block drives the rotating wheel to advance and rotate at the same time, the rotating wheel drives the swing plate to advance and rotate at the same time, the swing plate drives the positioning core to rotate clockwise until the swing plate contacts the swing guide limiting plate; Step 3: place the preformed locking washer workpiece after the blanking-punching large hole process on the upper surface of the lower fixed plate and the punching concave die, and use the outer circle of the positioning core to fix the large hole in the middle of the workpiece, and use the notch on the positioning core to fix the protruding boss in the middle large hole of the workpiece; Step 4: start the press, the upper die plate runs downward with the upper workbench of the press, the guide plate is first pressed against the workpiece under the pressure of the discharging rubber, and then the punching convex die moves downward to complete the first pre-punching of 12 holes of the workpiece with the punching concave die; Step 5: after the first pre-punching of the workpiece, the upper structure of the mold is reset by the slide block of the press, the guide plate discharges the workpiece under the action of the discharging rubber, so that the workpiece can still be in the positioning core, and the punching waste leaks out from the lower die and the lower workbench of the press; Step 6: close the control valve of the cylinder control valve, and the piston rod of the cylinder retreats to drive the push block to retreat, the push block drives the rotating wheel to retreat and rotate at the same time, the rotating wheel drives the swing plate to retreat and rotate at the same time, the swing plate drives the positioning core to rotate counterclockwise, the positioning core drives the workpiece to rotate counterclockwise until the swing plate contacts the swing guide limiting plate; Step 7: start the press, the upper die plate runs downward with the upper workbench of the press, the guide plate is first pressed against the workpiece under the pressure of the discharging rubber, and then the punching convex die moves downward to complete the second punching of the workpiece with the punching concave die, and the workpiece is taken out with the aid of a tool, and the punching waste leaks out from the lower die and the lower workbench of the press, so that the workpiece completes the punching of all 24 holes; Step 8: repeat steps 2 to 7 to manufacture the next workpiece.

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