CN103302166B - High-precision two-station covering part die - Google Patents

Abstract

The invention relates to a high-precision two-station covering part die, and belongs to the technical field of automobile dies. The die has the advantages that a pair of dies is stamped in two trimming processes at the same time, so that the die manufacturing cost is lowered; and compared with one-time trimming process, the two trimming processes have the advantages that through the adjustment of the trimming direction, the vertical trimming is carried out for different technical addendum surfaces, so that the product edge precision is higher. A trimming knife block of the covering part die is a combined knife block, and is easy to replace as compared with an integrated knife block, so that the service life of the die is prolonged; an upper die holder and a lower die holder are guided by internal guiding plates and a combined guiding structure formed by guide pillars and bushes, external guide plates and back blocks at the same time, so that not only is the precise guiding facilitated, but also the lateral force generated after a female die and a male die are in contact with each other is beneficial to cancellation, the damage of the female die and the male die is avoided, tapered positioners are used to guide the female die and the male die in the second process, so that the final precision after the product edge is trimmed is ensured, and the precision and safety of the movement of the die are ensured through using a plurality of position limiting mechanisms.

Description

A high-precision two-station cover mold

technical field

The patent of the invention relates to a high-precision two-station cover mold, which belongs to the technical field of automobile molds.

Background technique

At present, the automobile industry is developing rapidly, but the quality of automobile manufacturing has not been reduced at all, but the precision requirements are higher. Therefore, the development speed, quality requirements and manufacturing costs of new products have become important balance indicators for the competition of automobile companies.

Based on the rapid development and index requirements of the automobile industry, the quality requirements and costs of large-scale panel mold processing and manufacturing have also increased. Because the size of this type of mold is relatively large and the structure is relatively complicated, especially the trimming mold, the shape of the cutting edge is very irregular, and it is limited by the shape and size of the workpiece. When the trimming edge is damaged and then repaired and repaired, the time period is long and the maintenance cost is high.

In order to make up for the deficiencies in the structure of the existing trimming mold, the patent of the present invention provides a high-precision two-station cover mold, which has higher precision in trimming the edge of the part sheet; through a variety of guiding mechanisms, the guidance is more precise; The combined trimming cutter block is easy to repair and replace; and the mold manufacturing cost is low, the production efficiency is high, and the waste is also convenient to clean up.

Contents of the invention

The patent of the invention provides a high-precision two-station cover mold, which belongs to the technical field of automobile molds. The mold stamps two trimming processes in one pair of molds at the same time to reduce mold manufacturing costs; the advantage of the two trimming processes compared with one-time trimming is that by adjusting the trimming direction, vertical trimming is carried out for different process supplementary surfaces , so that the product edge precision is higher. The trimming cutter block of the cover mold of the present invention is a combined cutter block, which is easy to replace compared with the integral cutter block and improves the service life of the mold. The mold guides the upper and lower die bases simultaneously through the guide post guide sleeve, outer guide plate and backrest block composite guide structure, and the inner guide plate guides the upper and lower mold bases at the same time, which is not only conducive to accurate guidance, but also conducive to offsetting the lateral force generated after the contact between the convex and concave molds, avoiding the In the second process, the conical positioner is used to guide the convex and concave dies to ensure the final accuracy of the product after edge trimming.

The object of the present invention is to provide a two-station cover mold, which has higher precision in trimming the edge of the sheet material, more precise guidance, easy repair and replacement of trimming blades, low mold manufacturing cost, high production efficiency, and waste cleaning. convenient.

The technical solution of the present invention is: two trimming processes are stamped and formed in a pair of molds at the same time to reduce the cost of mold manufacturing; the advantage of the two trimming processes compared with one-time trimming is that by adjusting the trimming direction, it can be supplemented according to different processes. The surface is trimmed vertically, so that the edge precision of the product is higher.

The trimming cutter block in the two trimming processes is a combined cutter block, which is easy to replace compared with the integral cutter block, and can use higher-strength materials locally for parts with insufficient rigidity and strength, thereby reducing mold manufacturing costs. To improve the service life of the mold, the combined knife blocks are symmetrically distributed, so that the force on the mold is balanced; in the first process of the two trimming processes, the excess waste is divided into five pieces by the waste knife of the lower mold, which can save the unloading The device also simplifies the mold structure; the five pieces of waste are automatically slid out through the inclined discharge guide plate, which reduces manual material removal, reduces labor intensity, and improves work efficiency.

The mold guides the upper and lower mold bases simultaneously through the guide post guide sleeve, the backrest block with the guide slide plate and the composite guide structure of the die guide slide plate. Die vibration caused by punching force is precisely guided by the guide post guide sleeve and the die guide slide plate. The die guide slide plate is also beneficial to offset the lateral force generated after the contact between the punch and die, avoiding the damage of the punch and die, and in the second process In the process, a tapered positioner is used to guide the punch and die to ensure the final accuracy of the product after edge trimming.

The first process of the two trimming processes uses a combination of limit screws and springs to limit the stroke of the die, and provides a pressing force when the die is closed, and restores the die to its original shape when the die is opened. When the limit screw fails , the combined structure of safety screws and springs can prevent the die from falling; since there are no trimming cutters on both sides of the die in the second process, the limit plate is used to limit the travel of the die, saving mold manufacturing costs. When the limit plate fails , the safety plate can prevent the die from falling, so as to avoid mold damage and accidents; use a square limit block to limit the closing position of the upper and lower mold bases of the mold, and fine-tune the closing position of the upper and lower mold bases of the mold by adding gaskets to adjust the pressing force of the mold on the sheet .

The advantages of the present invention are: 1) The two trimming processes are stamped and formed in a pair of molds at the same time, which reduces the cost of mold manufacturing; the advantage of the two trimming processes compared with one-time trimming is that by adjusting the trimming direction, different processes The supplementary surface is trimmed vertically, so that the edge accuracy of the product is higher; 2) The trimming knife block in the two trimming processes is a combined knife block, which is easy to replace compared with the integral knife block, and can be used for insufficient rigidity and strength. The parts with high strength are used locally, so that the mold manufacturing cost is lower and the service life is longer; 3) The first process of the two trimming processes divides the waste into five pieces through the waste knife of the lower mold, which can save The removal of the unloading device also simplifies the mold structure; the five pieces of waste are automatically slid out through the inclined discharge guide plate, reducing manual material removal, reducing labor intensity, and improving work efficiency; The block, die guide slide plate and composite guide structure guide the upper and lower die bases at the same time, which is not only conducive to accurate guidance, but also conducive to offsetting the lateral force generated after the contact between the punch and die, and avoiding damage to the punch and die; 5) Based on the above guide structures, In the second process, a tapered positioner is used to guide the upper and lower molds to ensure the final accuracy of the product after edge trimming; 6) The first process of the two trimming processes uses a combination of limit screws and springs to limit the concave Die stroke, and provide pressing force when the mold is closed, and make the die return to its original shape when the mold is opened. When the limit screw fails, the safety screw and spring combination structure can prevent the die from falling; the second process uses limit The plate restricts the stroke of the die. When the limit plate fails, the safety plate can prevent the die from falling, so as to avoid mold damage and accidents; 7) Based on the above-mentioned limit mechanisms, a limit square limit block is used to limit the upper and lower die seats of the mold Closed position, by adding gaskets to fine-tune the closed position of the upper and lower mold seats of the mold, adjust the pressing force of the mold on the sheet, so as to improve the forming quality of the sheet.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the mold of the present invention;

Fig. 2 is a structural schematic diagram of an upper mold assembly;

Fig. 3 is a schematic diagram of the back of the two-process die;

Fig. 4 is a structural schematic diagram of the lower mold assembly;

Fig. 5 is a schematic diagram of the distribution of upper mold combined trimming cutter blocks;

Fig. 6 is a schematic diagram of the distribution of the combined trimming knife block and waste knife of the lower die;

Figure 7 is a comparison diagram before and after trimming of the product in process 1;

Figure 8 is a comparison diagram before and after trimming of the product in process 2;

In the attached drawings: 1-upper die base; 2-back block; 3-guide sleeve; 4-outer guide plate; 5-process 1 first upper die trimming knife block; Side cutter block; 7-process 1 third upper mold trimming knife block; 8-process 1 upper mold fourth trimming knife block; 9-process 1 fifth upper mold trimming knife block; 10-process 2 The first upper mold edge trimming knife block; 11-process 2 second upper mold edge trimming knife block; 12-process 2 third upper mold edge trimming knife block; 13-process 2 limit plate; 14-process 2 Safety pressure plate; 15-conical locator; 16-punch; 17-combined structure of limit spring and screw in process 1; 18-combined structure of safety spring and screw in process 1; 19-inner guide plate; 20-pressure plate in process 1 ;21-Procedure 1 binder plate insert; 22-Process 2 spring retainer; 23-Process 2 binder plate; 24-Guide column; 25-Lower mold base; 27-process 1 second trimming knife block of the lower die; 28-process 1 third lower die trimming knife block; 29-process 2 first lower die trimming knife block; 30-process 2 second Block lower mold trimming knife block; 31-process 2 third lower mold trimming knife block; 32-square limit block; 33-punching die set; 34-discharging inclined guide plate; 35-first block Lower mold scrap knife; 36-the second lower mold scrap knife; 37-the third lower mold scrap knife.

Detailed ways

As can be seen from Figures 1 to 5, the main components of the patented two-station cover mold of the present invention include: an upper mold assembly, a lower mold assembly and a guide assembly, wherein the upper mold assembly includes an upper mold base 1, an upper mold combined type Trimming knife block 5-12, punch 16, limit spring and screw combination structure 17, safety spring and screw combination structure 18, binder plate 20, binder plate insert 21; limit pressure plate 13 in process 2, Safety pressure plate 14, spring retainer 22, pressure plate 23; Lower die assembly includes lower die base 25, lower die combined trimming knife block 26-31, square limit block 32, punching concave die cover 33, row Material inclined guide plate 34, lower mold waste knife 35-37; guide assembly includes backrest block 2, guide sleeve 3, outer guide plate 4, tapered locator 15, inner guide plate 19, guide post 24.

Wherein, the installation method of the upper mold assembly is: first fix the punch 16 on the lower part of the binder plate 20, and then pass the binder plate 20 of the process 1, the binder plate insert 21 and the binder plate 23 of the process 2 through The limit spring and screw combined structure 17 on the back, the safety spring and screw combined structure 18 (this combined structure is by putting the limit spring and the safety spring on the screw) and the spring retainer 22 are connected to the middle position of the lower part of the upper die base 1 , and install twelve inner guide plates 19 on the side of the binder plate 20 of the operation 1 and the binder plate 23 of the operation 2, each six of each operation, and then the upper mold combined trimming knife block 5-12, namely It is composed of multiple trimming cutter blocks, fixed on the lower part of the upper die base 1, and distributed around the binder plate 20 of the process 1, the binder plate insert 21 and the binder plate 23 of the process 2, and finally the The limit pressing plate 13 and the safety pressing plate 14 are fixed on the bottom of the upper mold base 1 and on both sides of the upper mold combined trimming knife block 10-12; the installation method of the lower mold assembly is: the lower mold combined trimming knife block 26-31 is installed in the middle position of lower mold base 25 tops, and the punching die cover 33 that punching process hole is installed on lower mold combined type trimming knife block 26,28, and on lower mold combined type trimming knife block 26-31 3 scrap knives 35-37 and 6 discharge slant guide plates 34 are arranged around the upper die base 25, and a square limit block 32 is respectively installed at the four corners of the lower die base 25; the installation method of the guide assembly is: in the middle of the short side of the upper die base 1 Install the backrest block 2 and the guide sleeve 3 at the position, fix the outer guide plate 4 on the backrest block 2, install the guide post 24 at the middle position of the short side of the lower mold base 25, and install the cone at the center of the upper mold base 1 and the lower mold base 25. Shape locator 15; Finally install auxiliary parts.

The processing of large-scale covering parts needs to go through six processes of deep drawing, trimming and punching process holes, trimming, trimming and punching, flanging and shaping, and side punching and splitting. It is completed by three sets of molds. The patented two-station covering parts of the invention The mold completes the two processes of trimming, punching process holes and trimming, and the protected mold structure is the second set of molds, that is, the trimming, punching process and trimming process are completed.

The method of using the mold is as follows: the upper mold base 1 is fixed on the press slide block, the lower mold base 25 is fixed on the working table of the press, and the parts formed in the previous process are placed in the combined mold trimming of process 1 and process 2. On the knife block 26-31, the process 1 is positioned through the concave mold surface. Compared with the process 2 and the process 1, the trimming direction is rotated at an angle of 45°, and the parts after the trimming of the process 1 are placed on the die of the process 2. When it is on the shape surface, it will slide out of the die shape surface, so in the process 1, the process hole is punched out through the punch 16 and the punching die cover 33, and the positioning is done for the process 2, so that the process 2 parts pass through the die shape surface and the punching die cover 33. The process hole is positioned. Through the combined structure of the backrest block 2 and the outer guide plate 4, the rough guidance is carried out, and the guide column 24, the guide sleeve 3 and the inner guide plate 19 are used for fine guidance. The upper die base 1 goes down with the slider of the press. The material plate 20, the binder plate insert 21 and the binder plate 23 of the process 2 are in contact with the parts, and the upper mold base 1 continues to descend, due to the limit spring and the screw combination structure 17, the safety spring and the screw combination structure 18 and the spring retainer 22 compression, the spring generates spring force to compress the sheet metal, after the spring is compressed to a certain amount, the combined trimming knife block 5-12 of the upper mold contacts the upper surface of the sheet material, the upper mold base 1 continues to go down, and the upper mold in process 1 The combined trimming knife block 5-9 cuts off the trimming surface around the sheet, cuts the trimming surface into five pieces by the scrap knife 35-37 of the lower die, and cuts the trimming surface into five pieces from the respective discharge inclined guide plate 34 Slide down, process 2 is finely guided by the tapered positioner 15, the upper mold combined trimming knife block 10-12 cuts off the trimming surface of one side of the sheet and passes through the limit pressure plate 13 and the safety pressure plate 14 as a protection, the trimming surface slides down from the inclined discharge guide plate 34, the upper mold base 1 and the lower mold base 25 are limited by the square limit block 32; The clamping plate 20 of 1, the clamping plate insert 21 and the clamping plate 23 of process 2 return to the initial position, and the parts in process 1 and process 2 are taken out, as shown in Fig. 6 and Fig. 7 .

Claims (3)

1. a high accuracy two station cladding member mold, for operation 1 deburring of covering and punching and operation 2 deburring again, comprise upper die component, lower mold assemblies and guidance set, it is characterized in that: upper die component comprises upper bolster, patrix Combined trimming cutter block, drift, limit spring and screw association structure, safety spring and screw association structure, operation 1 holding pad, holding pad insert; Spacing pressing plate, safe pressing plate, spring retainer, operation 2 holding pad; Lower mold assemblies comprises die shoe, counterdie Combined trimming cutter block, square limited block, punching concave die cover, discharge slope guide plate, counterdie waste knife; Guidance set comprises and leans against block, guide pin bushing, outer guide plate, taper locator, inner guide plate, guide pillar;

Wherein, the installation method of upper die component is: the bottom first drift being fixed on operation 1 holding pad, again by operation 1 holding pad, holding pad insert and operation 2 holding pad pass through limit spring and the screw association structure at the back side, safety spring and screw association structure and spring retainer are connected to the centre position of upper bolster bottom, and in the side of operation 1 holding pad and operation 2 holding pad, 12 inner guide plates are installed, each six of each operation, again will by operation 1 first piece of patrix edge iron block, operation 1 second piece of patrix edge iron block, operation 1 the 3rd piece of patrix edge iron block, operation 1 patrix the 4th piece of edge iron block, operation 1 the 5th piece of patrix edge iron block, operation 2 first pieces of patrix edge iron blocks, the patrix Combined trimming cutter block of operation 2 second pieces of patrix edge iron blocks and operation 2 the 3rd piece of patrix edge iron block composition is fixed on the bottom of upper bolster, and be distributed in operation 1 holding pad, around holding pad insert and operation 2 holding pad, finally by spacing pressing plate, safe pressing plate is fixed on the bottom of upper bolster, spacing pressing plate and safe pressing plate are distributed in by operation 2 first pieces of patrix edge iron blocks simultaneously, the both sides of the operation 2 patrix edge iron block of operation 2 second pieces of patrix edge iron blocks and operation 2 the 3rd piece of patrix edge iron block composition, the installation method of lower mold assemblies is: will by operation 1 first piece of counterdie edge iron block, operation 1 second piece of counterdie edge iron block, operation 1 the 3rd piece of counterdie edge iron block, operation 2 first pieces of counterdie edge iron blocks, the counterdie Combined trimming cutter block of operation 2 second pieces of counterdie edge iron blocks and operation 2 the 3rd piece of counterdie edge iron block composition is arranged on the centre position on die shoe top, operation in counterdie Combined trimming cutter block 1 first piece of counterdie edge iron block and operation 1 the 3rd piece of counterdie edge iron block install the punching concave die cover rushing fabrication hole, and around counterdie Combined trimming cutter block layout 3 lump waste materials cutter and 6 discharge slope guide plates, a square limited block is respectively installed in the corner of die shoe, the installation method of guidance set is: install in the centre position of upper bolster minor face and lean against block, guide pin bushing, and leaning against fixing outer guide plate on block, install guide pillar in the centre position of die shoe minor face, taper locator is installed in the center of upper bolster and die shoe.

2. a kind of high accuracy two station cladding member mold as claimed in claim 1, is characterized in that: described limit spring and screw association structure and safety spring and screw association structure respectively limit spring and safety spring are enclosed within the combining structure that screw is formed.

3. the using method of a kind of high accuracy two station cladding member mold as claimed in claim 1, by two procedures: operation 1 deburring and punching and operation 2 deburring again, carry out in the mold simultaneously, it is characterized in that comprising the steps: that upper bolster is fixed on press ram, die shoe is fixed on press bench face, part after drawing is placed on the counterdie Combined trimming cutter block of operation 1 and operation 2, operation 1 is positioned by die shape face, because operation 2 is compared with operation 1, deburring direction have rotated 45° angle degree, when part after operation 1 deburring is placed on the die shape face of operation 2, die shape face can be skidded off, therefore in operation 1, fabrication hole is gone out by drift and punching concave die cover, for operation 2 is located, thus operation 2 part is positioned by die shape face and fabrication hole, carry out thick guiding and guide pillar, guide pin bushing and inner guide plate and carry out essence by leaning against block and outer guide plate combining structure and lead, upper bolster is descending with press ram, after descending certain distance, the holding pad of operation 1, the holding pad of holding pad insert and operation 2 and feature contacts, upper bolster continues descending, due to limit spring and screw association structure, safety spring and screw association structure and spring retainer compression, spring produces spring force makes plate compacted, spring-compressed is to after a certain amount of, patrix Combined trimming cutter block contacts with plate upper surface, upper bolster continues descending, operation in operation 1 in patrix Combined trimming cutter block 1 first piece of patrix edge iron block, operation 1 second piece of patrix edge iron block, operation 1 the 3rd piece of patrix edge iron block, the deburring face of plate surrounding is cut away by operation 1 patrix the 4th piece of edge iron block and operation 1 the 5th piece of patrix edge iron block, by counterdie waste knife, the deburring face of cutting is cut into five pieces again, slide from respective discharge slope guide plate, operation 2 is under taper locator carries out essence guiding, operation in patrix Combined trimming cutter block 2 first pieces of patrix edge iron blocks, operation 2 second pieces of patrix edge iron blocks and operation 2 the 3rd piece of patrix edge iron block the deburring face of a plate side is cut away and by spacing pressing plate spacing and safe pressing plate as protection, deburring face is slided from discharge slope guide plate, it is spacing that upper bolster and die shoe pass through square limited block, upper bolster is up, is recovered gradually by the spring compressed, and makes the holding pad of the holding pad of operation 1, holding pad insert and operation 2 get back to initial position, the part in removal process 1 and operation 2.