A chip punching die for commutator production

Abstract

The present invention discloses a die for punching and patching of commutator production, comprising an upper die, a lower die and a positioning mechanism, wherein the upper die comprises a fixed plate, a fixed plate insert and a punch are installed in a punch fixing hole of the fixed plate through a polished rod passing through the fixed plate, a stripper plate matched therewith is installed below the fixed plate, a stripper plate insert is installed in a stripper plate insert mounting hole of the stripper plate through a polished rod passing through the fixed plate, a forming hole 1 is provided in the middle of the stripper plate insert, the forming hole 1 is composed of a stripper plate stopper hole and a punch hole, a stripper plate stopper is installed in the stripper plate stopper hole, a die fixing plate is installed below the stripper plate, a die pad and a die insert are installed in the die fixing hole of the die fixing plate, a forming hole 2 is provided in the middle of the die insert, the forming hole 2 is composed of a product blanking hole and a stopper hole, and the die fixing plate is installed below the bottom plate. The present invention is easy to operate, has high work efficiency, stable product quality, reduces the ability requirements of operators and can reduce the labor intensity of workers.

Description

Technical field:

[0002] The invention relates to the field of commutator production molds, and mainly relates to a chip punching mold used for commutator production. Background technology:

[0004] With the progress of society, electric motors are widely used in industrial production, homes, public places and other fields. The commutator is a part in the motor that works with the carbon brushes to keep the motor rotating.

[0005] At present, the production and processing methods of commutators are mainly divided into three types: insert type, roll type (copper plate type) and full plastic type. The three processing methods each have their own advantages and disadvantages. The present invention is mainly aimed at the production and processing of larger-sized insert type commutators. The main processing technology for the production and processing of larger-sized insert type commutators is: copper extrusion - drawing - punching commutator segments - vibration cleaning - punching mica sheets and iron sheets - sheet arrangement - rough boring - rough turning of the outer circle - curing - fine boring - electric back boring - fine turning of the outer circle - milling of terminal slots - polishing - inspection. Due to the large specifications of this type of commutator, the production process must use iron sheets and mica sheets in combination to produce products with qualified dimensions and excellent performance, so iron sheets play a very important role in the production process of this type of commutator.

[0006] The existing iron sheet production process adopts manual punching. The so-called manual punching means that workers cut the iron plate into strips of a certain width according to production requirements, and then feed the strip iron plate into a mold, step on the punch press, and form the required shape through the mold processing. After each processing of the punch press, the worker needs to peel the finished product off the iron plate one by one, which greatly reduces the production efficiency. The quality of the finished product is also unstable due to the different mold structures and employee quality, which has a certain impact on the commutator arrangement and press forming. The labor intensity of workers is high and it cannot meet the needs of mass production of commutators. Summary of the invention:

[0008] The purpose of the present invention is to make up for the defects of the existing technology and provide a punching and patching mold for commutator production, which is easy to operate, has high work efficiency, stable product quality, reduces the ability requirements of operators and can reduce the labor intensity of workers.

[0009] The present invention is achieved through the following technical solutions:

[0010] A die for punching and patching of commutator production, comprising an upper die, a lower die and a positioning mechanism, characterized in that: the upper die comprises a fixed plate, a punch fixing hole is installed in the middle of the fixed plate, a fixed plate insert and a punch are installed in the punch fixing hole through a polished rod passing through, a stripper plate matched with the fixed plate is installed below the fixed plate, a stripper plate insert mounting hole is provided in the middle of the stripper plate, a stripper plate insert is installed in the stripper plate insert mounting hole through a polished rod passing through, and a forming hole is provided in the middle of the stripper plate insert 1. The forming hole 1 is composed of a stripper plate stopper hole and a punch hole, a stripper plate stopper is installed in the stripper plate stopper hole, a lower die is installed below the stripper plate, the lower die includes a die fixing plate, a die fixing hole is provided in the middle of the die fixing plate, a die pad is installed in the die fixing hole, a die insert matching with it is installed on the die pad, a forming hole 2 is provided in the middle of the die insert, the forming hole 2 is composed of a product blanking hole and a stopper hole, and the bottom of the die fixing plate is installed on the bottom plate.

[0011] The stripping plate is connected to the fixed plate through long-handled screws and nuts distributed at four corners, and corresponding guide post guide holes are provided between the fixed plate and the stripping plate, and guide posts that are clearance-matched with the guide posts are installed in the guide post guide holes.

[0012] The fixed plate insert has through holes for installing and fixing the polished rod on both sides, and a punch mounting hole is provided in the middle of the fixed plate insert. A punch is mounted in the punch mounting hole, and slots for matching the polished rod are provided on both sides of the punch.

[0013] Both sides of the stripper plate insert are provided with slots for installing and fixing the polished rod, the stripper plate block hole is a T-shaped hole, and the cross section of the stripper plate block is a T-shaped structure that matches the stripper plate block hole.

[0014] The upper end surface of the die pad is provided with a dovetail convex rail, the lower end surface of the die insert is provided with a dovetail guide groove matched with the dovetail convex rail, and both ends of the die pad are connected and installed with the die fixing plate through a polished rod.

[0015] The product blanking hole is the same as the iron sheet required for production. The upper plane of the die insert is parallel to the plane of the fixed plate. The middle part of the die pad is provided with a forming hole three that cooperates with the forming hole two. The forming hole three is also composed of a product blanking hole and a block hole, and the shape of the product blanking hole part of the forming hole three is the same as that of the die insert but slightly larger in size.

[0016] The die stopper is installed in the stopper hole of the combination of the die insert and the die pad, and the upper end protrudes 2 mm from the plane of the die fixing plate. The bottom end of the stripper plate stopper on the stripper plate leaves a certain space for the protruding part of the die stopper. The stopper hole is a T-shaped hole, and the cross-section of the die stopper is a T-shaped structure that matches the stopper hole.

[0017] There are guide hook holes one at intervals distributed on the upper end surface of the die fixing plate on the left and right sides of the forming hole two, and a positioning mechanism is installed in the guide hook hole one, and the positioning mechanism includes a guide hook, and the guide hook is a columnar structure, and the upper end of one side is provided with a rectangular limiting groove for clamping a limiting iron sheet, and a positioning light rod hole is provided on the other side of the guide hook, which is connected to the die fixing plate through the light rod, and the stripping plate is provided with guide hook holes two corresponding to the guide hooks.

[0018] The base plate is a rectangular steel plate, which is placed on the lower plane of the die fixing plate and overlaps with it, and is provided with guide post holes and blanking holes corresponding to the guide post holes and blanking holes on the die fixing plate. The guide post holes of the die fixing plate and the guide post holes of the guide plate above it are connected through guide post guides. The die fixing plate and the base plate are connected by screws to form a lower die, and the lower die is clamped on the work table of the punch press.

[0019] The chamfer of one of the corners of the fixed plate insert, the stripper plate insert and the die insert is different from the other three corners, and the chamfers of the corresponding mounting holes are matched with them respectively.

[0020] The principle is: after an iron plate of a certain width is positioned on both sides by a positioning mechanism, the front end of the iron plate is limited by a die stopper. After the iron plate is fixed and clamped, the upper die is moved downward by the punch press, and the stripper plate cooperates with the die fixing plate to clamp the iron plate. The punch presses the iron plate to punch the iron plate into a finished iron sheet of a certain shape. As the punch press continues to descend, the iron plate enters the product blanking hole on the die insert block into the product blanking hole on the die pad. The punch pushes the finished iron sheet down from the bottom plate hole, and the iron plate scrap will be pushed out from the back of the die as the punching continues, thereby distinguishing the finished iron sheet from the scrap.

[0021] The advantages of the present invention are:

[0022] (1) The mold can be installed on the punch press without using a mold frame, which reduces the size and weight of the mold, saves the cost of ordering the mold, and also reduces the labor intensity of the mold fitter when installing the mold.

[0023] (2) In the design of the mold, the design of placing the product hole on the insert is widely used, which makes this set of molds quite versatile. When it is necessary to produce similar iron sheets, it is only necessary to order the corresponding insert, punch and base plate. At the same time, this design also greatly saves the cost of replacing damaged punches and damaged product holes. It only needs to replace a small component instead of directly scrapping the entire board.

[0024] (3) The mold has added a positioning mechanism. The guide hook limits the left and right range of movement of the strip iron plate to avoid scrapping due to incomplete shape of the finished product. The die block limits the feeding distance. Workers do not need to visually confirm whether the feeding is in place at all times. The feeding can be continuous, which not only reduces the labor intensity of workers during processing, but also improves production efficiency and greatly reduces scrapping caused by workers' lack of concentration and inadequate feeding.

[0025] (4) The mold uses an ingenious anti-fouling mechanism. The lower right corner of the insert is chamfered differently from the other three corners. In addition, the inserts are positioned and fixed by polished rods, which prevents the mold from being installed upside down or upside down. The upper and lower molds are positioned with guide rods, eliminating the need for repeated trial cutting to ensure the mold gap. These designs not only reduce the labor intensity of workers installing the mold, but also reduce the technical requirements for the installer and reduce the defective rate of products.

[0026] (5) A spring is installed on the guide rod between the fixed plate and the stripper plate. This makes the stripper plate press onto the die fixed plate first when the punch press is pressing downward. However, since the spring begins to shrink at this time, the stripper plate will perform a short flattening process on the iron plate before the punch hits the iron plate. This ensures that the iron plate is in a relatively flat state when the punch hits the iron plate, thereby improving the quality of the punched iron sheet. Description of the drawings:

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 This is a schematic diagram of the exploded structure for installing related components on the fixed plate.

[0030] Figure 3 This is a schematic diagram of the exploded structure for installing related components on the stripper plate.

[0031] Figure 4 Schematic diagram of the structure of the upper mold.

[0032] Figure 5 This is a schematic diagram of the exploded structure for the installation of related components on the die fixing plate.

[0033] Figure 6 Schematic diagram of the structure of the lower mold.

[0034] Figure 7 It is a structural diagram of the cooperation between the die pad and the die insert. Specific implementation method:

[0036] See attached figure.

[0037] A die for punching and patching of commutator production, comprising an upper die, a lower die and a positioning mechanism, wherein the upper die comprises a fixed plate 3, a punch fixing hole is installed in the middle of the fixed plate 3, a fixed plate insert 3-1 and a punch 10 are installed in the punch fixing hole through a light rod passing through, a stripper plate 4 is installed below the fixed plate 3, a stripper plate insert mounting hole is provided in the middle of the stripper plate 4, a stripper plate insert mounting hole is installed in the stripper plate insert mounting hole through a light rod 11 passing through, a forming hole 1 is provided in the middle of the stripper plate insert 4-1, and the forming hole 1 is formed by the stripper plate The stripper plate 4 is composed of a block hole 4-4 and a punch hole 4-3, a stripper plate block 4-2 is installed in the stripper plate block hole 4-4, a lower die is installed below the stripper plate 4, and the lower die includes a die fixing plate 5, a die fixing hole 5-3 is provided in the middle of the die fixing plate 5, a die pad 5-1 is installed in the die fixing hole 5-3, a die insert 5-2 is installed on the die pad 5-1, a forming hole 2 is provided in the middle of the die insert 5-2, and the forming hole 2 is composed of a product blanking hole and a block hole, and the bottom of the die fixing plate 5 is installed on the bottom plate 6.

[0038] The stripping plate 4 is connected to the fixed plate 3 by long-handled screws and nuts distributed at four corners, and corresponding guide post guide holes 3-2 and 4-5 are respectively provided between the fixed plate 3 and the stripping plate 4. Guide posts 7 with clearance fit therewith are installed in the guide post guide holes 3-2 and 4-5.

[0039] The fixed plate insert 3-1 has through holes for installing and fixing the polished rod on both sides, and a punch mounting hole is provided in the middle of the fixed plate insert. A punch 10 is mounted in the punch mounting hole, and slots for matching the polished rod are provided on both sides of the punch 10.

[0040] Both sides of the stripper plate insert 4-1 are provided with slots for installing and fixing the polished rod, the stripper plate block hole 4-4 is a T-shaped hole, and the cross section of the stripper plate block 4-2 is a T-shaped structure that matches the stripper plate block hole 4-4.

[0041] The upper end surface of the die pad 5-1 is provided with a dovetail convex rail, and the lower end surface of the die insert 5-2 is provided with a dovetail guide groove that cooperates with the dovetail convex rail. The two ends of the die pad 5-2 are connected and installed with the die fixing plate through a polished rod 11.

[0042] The product blanking hole is the same as the iron sheet to be produced. The flat surface of the die insert 5-2 is parallel to the plane on the fixed plate 3. The middle part of the die pad 5-1 is provided with a forming hole three that cooperates with the forming hole two. The forming hole three is also composed of a product blanking hole and a block hole, and the shape of the product blanking hole part of the forming hole three is the same as that of the die insert but slightly larger in size.

[0043] The die stopper is installed in the stopper hole of the combination of the die insert and the die pad, and the upper end protrudes 2 mm from the plane of the die fixing plate. The bottom end of the stripper plate stopper on the stripper plate leaves a certain space for the protruding part of the die stopper. The stopper hole is a T-shaped hole, and the cross-section of the die stopper is a T-shaped structure that matches the stopper hole.

[0044] The above technical solution is further defined as follows:

[0045] Upper mold

[0046] The punch 10 and the fixed plate insert 3-1 are positioned and fixed by a polished rod 11. The guide post 7 has an interference fit with the guide post fixing hole 3-2 and is then sealed by a backing plate 2. The stripper plate 4 is parallel to the fixed plate 3, with the punch guide hole 4-3 and the punch 10, and the guide post 7 and the guide post guide hole 4-4 having a clearance fit. The stripper plate 4 is connected to the fixed plate 3 by a long-handled screw, a spring 8, and a hexagonal nut 9. The spring 8 is then compressed and extended, pushing the fixed plate 3 and the stripper plate 4 apart a certain distance, lowering the punch below the plane of the stripper plate 4 to perform the stripping operation. The stripper plate stopper is inserted into the stopper hole of the middle forming hole of the stripper plate insert. The stripper plate insert and the stripper plate are positioned and installed by a polished rod. The backing plate 2 is connected to the fixed plate 3 and the die handle 1 by screws, thus forming the upper die. The upper die is fixed to the punch press plane by the die handle 1 and the punch press hole.

[0047] Lower die:

[0048] The die fixing plate is a rectangular steel plate, 20mm thick, with a die fixing hole 5-3, a guide post hole 5-4, and a guide hook hole 5-5 in the middle. The die pad and the die insert are combined together by a dovetail fit, interference fit with the die fixing hole 5-3 and positioned by a light rod, wherein the product blanking hole part of the forming hole of the die insert (because the forming hole aggregates the product blanking hole and the block hole) has the same size as the required production iron sheet, and the shape of the product blanking hole part of the die pad 5-1 is the same as that of the die insert 5-2, but the size is 0.6mm larger. The upper plane of the combined die insert is parallel to the upper plane of the fixing plate 5; the bottom plate 6 is a single rectangular steel plate, placed on the lower plane of the die fixing plate 5 and overlapped, and is provided with guide post holes and blanking holes corresponding to the die fixing plate 5; the die fixing plate 5 and the bottom plate 6 are connected by screws to form a lower die, and the lower die is clamped on the work table of the punch press.

[0049] Positioning mechanism:

[0050] The material guide hook is a rectangular block with a positioning rod hole on one side and an iron sheet limiting groove on the other side. It is 24mm high and is installed on the die fixing plate 5. The hook protrudes 4mm from the flat surface of the die fixing plate 5 to limit the left and right movement range of the strip iron plate. At the same time, corresponding material guide hook holes are also left on the stripping plate 4 to protect the material guide hook; the die stopper is installed on the stopper part of the forming hole of the die pad block and insert assembly, protruding 2mm from the flat surface of the die fixing plate 5 to control the feeding distance. Because the length of the iron sheet to be produced is greater than the size of the die stopper, it will not affect the feeding of the corner material. At the same time, the stripping plate stopper on the stripping plate is deliberately reduced in height by 4mm to leave space for the protruding part of the die stopper.

Claims

1. A die for punching and patching of commutator production, comprising an upper die, a lower die and a positioning mechanism, characterized in that: The top of described sliding panel also is provided with an interlock plate, and the interlock plate is hinged on the base plate, is fixed with a backing pin on the interlock plate, and an end of sliding panel withstands on the backing pin of interlock plate. The stripper plate is connected to the fixed plate by long-handled screws and nuts distributed at four corners, and corresponding guide post guide holes are provided between the fixed plate and the stripper plate, and guide posts with clearance fit are installed in the guide post guide holes; The fixed plate insert is provided with through holes for installing and fixing the polished rod on both sides, and a punch mounting hole is provided in the middle of the fixed plate insert. A punch is clamped in the punch mounting hole, and slots for matching with the polished rod are provided on both sides of the punch. Both sides of the stripper plate insert are provided with slots for installing and fixing the polished rod, the stripper plate stopper hole is a T-shaped hole, and the cross section of the stripper plate stopper is a T-shaped structure that matches the stripper plate stopper hole; The upper end surface of the die pad is provided with a dovetail convex rail, the lower end surface of the die insert is provided with a dovetail guide groove that cooperates with the dovetail convex rail, and both ends of the die pad are connected and installed with the die fixing plate through a polished rod; The product blanking hole is the same as the iron sheet to be produced. The upper plane of the die insert is parallel to the plane on the die fixing plate. The middle part of the die pad is provided with a forming hole three that cooperates with the forming hole two. The forming hole three is also composed of a product blanking hole and a stopper hole. The shape of the product blanking hole part of the forming hole three is the same as that of the die insert but slightly larger in size. The die stopper is installed in the stopper hole of the assembly of the die insert and the die spacer, and the upper end thereof protrudes 2 mm from the plane of the die fixing plate. The bottom end of the stripper plate stopper on the stripper plate leaves a certain space for the protruding portion of the die stopper. The stopper hole is a T-shaped hole, and the cross-section of the die stopper is a T-shaped structure that matches the stopper hole. The upper end surface of the die fixing plate on the left and right sides of the second forming hole is distributed with a spaced-apart material guide hook hole 1, and a positioning mechanism is installed in the material guide hook hole 1. The positioning mechanism includes a material guide hook, and the material guide hook is a cylindrical structure. The upper end of one side is provided with a rectangular limiting groove for clamping a limiting iron sheet. The other side of the material guide hook is provided with a positioning polished rod hole, which is connected to the die fixing plate through the polished rod. The stripper plate is distributed with a material guide hook hole 2 corresponding to the material guide hook; The bottom plate is a rectangular steel plate, which is placed on the lower plane of the die fixing plate and overlaps with it, and is provided with guide post holes and blanking holes corresponding to the guide post holes and blanking holes on the die fixing plate. The guide post holes of the die fixing plate are connected to the guide post holes of the stripper plate above it through guide post guides. The die fixing plate and the bottom plate are connected by screws to form a lower die, and the lower die is clamped on the work table of the punch press. The round chamfer of one of the corners of the fixed plate insert, the stripper plate insert and the die insert is different from the other three corners, and the round chamfers of the corresponding mounting holes are matched with them respectively.

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