CN211071472U

CN211071472U - Composite die structure for punching lock hole

Info

Publication number: CN211071472U
Application number: CN201922083750.0U
Authority: CN
Inventors: 易言海
Original assignee: Dongguan Xinghai Sheng Precision Technology Co ltd
Current assignee: Dongguan Xinghai Sheng Precision Technology Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-07-24
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a lock hole punching compound die structure, which comprises an upper die combination and a lower die combination, wherein the upper die combination comprises a punch, a stripping guide sleeve, a punch guide rod, a stripping spring and an upper die cutter rod head, the lower die combination comprises a lower die holder, and a forming die head is arranged on the lower die holder; the punch comprises a convex hull punch and a lock hole punch, the convex hull punch surrounds the lock hole punch in the middle, and the lock hole punch is slightly recessed in the convex hull punch so as to form a punching structure that the convex hull punch contacts with a workpiece firstly and the lock hole punch contacts with the workpiece later during punching. The utility model discloses a mutual cooperation of parts such as convex closure drift, lockhole drift, activity pressure flitch, forming die head and dashing lockhole concave part, only need a punching press can accomplish product convex closure and lockhole shaping, can keep the lockhole can not the tensile deformation, and the size also can be guaranteed, and the machining precision is higher. Meanwhile, only one set of die is needed to complete the molding operation, so that the cost and the energy consumption can be reduced, and the production efficiency is improved.

Description

Composite die structure for punching lock hole

Technical Field

The utility model relates to a metal product processing technology field, concretely relates to compound mould that is used for carrying out shaping lockhole for products such as cabinet door.

Background

In some products, a lock hole is required to be formed, such as a side door of a cabinet, and the lock hole is generally formed in a groove. The traditional forming method generally adopts two-step separated punching, namely, firstly, a set of die equipment is used for punching a groove (a convex hull is seen from the other side), then, a set of die equipment is used for punching a lock hole in the groove, and of course, the punching is carried out from one side of the convex hull during the forming. The disadvantages of this approach are mainly three, first, the product processing efficiency is low, and especially the time wasted on product transfer is large; secondly, the edge of the lock hole is easy to deform during punching, the size is not easy to master, and the machining precision is low; thirdly, the cost is high, two sets of dies are needed, the die positions of the rotary die plate are occupied, and meanwhile, the energy consumption is high.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a towards lockhole compound die structure that simple structure, design are more reasonable, towards the lockhole effect better, production efficiency is higher, be favorable to reduce cost.

In order to solve the technical problem, the utility model adopts the following technical scheme: a kind of punching keyhole compound die structure, including upper die assembly and lower die assembly, the upper die assembly includes the drift, takes off the material guide bush, drift guide arm, takes off the material spring and upper die cutter arbor head, the upper end of drift connects the drift guide arm and forms the lower punching structure, drift and drift guide arm are set up in taking off the material guide bush, the drift is contacted with work piece from the outside of taking off the material guide bush out of the lower end when being impacted; the stripping spring is sleeved outside the punch guide rod, the punch guide rod is connected with the upper die cutter bar head, and the upper die cutter bar head is butted with the machine tool impact head; the lower die combination comprises a lower die base, and a forming die head is arranged on the lower die base, and is characterized in that: the punch comprises a convex hull punch and a lock hole punch, the convex hull punch surrounds the lock hole punch in the middle, and the lock hole punch is slightly recessed in the convex hull punch so as to form a punching structure that the convex hull punch contacts with a workpiece firstly and the lock hole punch contacts with the workpiece later during punching; the top of the forming die head is in a shape matched with the convex hull on the workpiece, a concave lock hole punching concave part is arranged in the middle of the top of the forming die head, the lock hole punching concave part is aligned with the lock hole punch head, and the depth of the lock hole punching concave part is larger than the length of the lock hole punch head below the convex hull punch head.

Furthermore, the lower die assembly also comprises a movable pressure plate, and the movable pressure plate is arranged on the lower die base through a pressure spring to form a structure capable of moving up and down; the upper part of the molding die head is embedded into the movable pressure plate, the top surface of the movable pressure plate is higher than the top surface of the molding die head in the die opening state, and the molding die head protrudes out of the movable pressure plate in the die closing state. When the convex hull punch is punched downwards, the movable pressure plate moves downwards, the exposed forming die head is matched with the convex hull punch to form the reversely buckled convex hull, and the convex hull is tightly fastened along with the downward punching of the lock hole punch to punch out the lock hole.

Further, the upper die assembly is arranged in an upper die rotary die disc of the numerical control machine tool, the lower die assembly is arranged in a lower die rotary die disc of the numerical control machine tool, and the top surface of the lower die assembly is higher than the top surface of the lower die rotary die disc by not less than 5 mm. It should be noted that this installation manner of the mold is only one of the prior art.

Further, the upper edge position of the forming die head is in a chamfer structure so as to form an inclined structure of the convex hull edge.

Preferably, the workpiece is of a flat plate-shaped structure, the thickness of the workpiece is 1mm, the height of the punched convex hull is 3.3mm, the height of the chamfer part of the edge of the forming die is 3.4mm, and the length of the downward convex part of the convex hull punch is 3.4 mm.

When the punching machine is used for punching, the stripping spring can be buffered along with different stress requirements of the depth of parameters set by the machine tool, the stripping spring is compressed when being pressed by the impact head of the machine tool, the stripping guide sleeve presses a workpiece, the punch continues to punch downwards out of the stripping guide sleeve, and the depth of the waste material separated from the lower die when the waste material is punched to 1/2 of the thickness of the workpiece is about 0.5-1.5 mm. After punching, the machine tool impact head returns, the stripping spring, the punch guide rod and the punch also return, and the stripping guide sleeve leaves away from the workpiece.

The utility model discloses a mutual cooperation of parts such as convex closure drift, lockhole drift, activity pressure flitch, forming die head and dashing lockhole concave part, only need a punching press can accomplish the shaping of product convex closure and lockhole, once only accomplish the operation can keep the lockhole can not the tensile deformation, the size also can be guaranteed, the machining precision is higher. Meanwhile, the molding operation can be completed by only one set of mold, thereby being beneficial to reducing the cost and energy consumption and improving the production efficiency.

Drawings

FIG. 1 is a schematic view of the mold assembly of the present invention;

FIG. 2 is a schematic view of the lower mold assembly and the workpiece of the present invention;

FIG. 3 is a schematic view of the mold assembly of the present invention;

fig. 4 is a schematic view of the product with the lock hole.

In the figure, 1 is an upper die assembly, 11 is an upper die cutter bar head, 12 is a punch guide rod, 13 is a stripping guide sleeve, 14 is a convex hull punch head, 15 is a lockhole punch head, 16 is a stripping spring, 2 is a lower die assembly, 21 is a lower die holder, 22 is a movable pressure plate, 23 is a forming die head, 24 is a lockhole punching concave part, 3 is a workpiece, 31 is a convex hull, 32 is a lockhole, 4 is an upper die rotary die disc, 5 is a machine tool impact head, and 6 is a lower die rotary die disc.

Detailed Description

In the embodiment, referring to fig. 1-4, the lock hole punching compound die structure includes an upper die assembly 1 and a lower die assembly 2, where the upper die assembly 1 includes a punch, a stripping guide sleeve 13, a punch guide rod 12, a stripping spring 16, and an upper die cutter bar 11, the upper end of the punch is connected to the punch guide rod 12 to form a lower punch structure, the punch and the punch guide rod 12 are disposed inside the stripping guide sleeve 13, and the punch penetrates through the stripping guide sleeve 13 from the lower end to contact with a workpiece 3 when being impacted; the stripping spring 16 is sleeved outside the punch guide rod 12, the punch guide rod 12 is connected with the upper die cutter bar head 11, and the upper die cutter bar head 11 is in butt joint with the machine tool impact head 5; the lower die assembly 2 comprises a lower die base 21, and a forming die head 23 is arranged on the lower die base 21; the punch comprises a convex hull punch 14 and a lock hole punch 15, wherein the convex hull punch 14 surrounds the lock hole punch 15 in the middle, and the lock hole punch 15 is slightly recessed inside the convex hull punch 14 (about 1-2mm recessed) so as to form a punching structure that the convex hull punch 14 contacts the workpiece 3 firstly and the lock hole punch 15 contacts the workpiece 3 later during punching; the top of the forming die head 23 is in a shape matched with the convex hull 31 on the workpiece 3, a concave lock punching hole concave part 24 is arranged in the middle of the top of the forming die head 23, the lock punching hole concave part 24 is aligned with the lock punching head 15, and the depth of the lock punching hole concave part 24 is larger than the length of the lock punching head 15 below the convex hull punching head 14.

The lower die assembly 2 further comprises a movable pressure plate 22, and the movable pressure plate 22 is mounted on the lower die base 21 through a pressure spring to form a structure capable of moving up and down; the upper part of the molding die head 23 is embedded in the movable pressure plate 22, the top surface of the movable pressure plate 22 is higher than the top surface of the molding die head 23 in the die opening state, and the molding die head 23 protrudes above the movable pressure plate 22 in the die closing state. When the convex hull punch 14 is punched downwards, the movable pressure plate 22 moves downwards, the exposed forming die head 23 is matched with the convex hull punch 14 to form the reverse convex hull 31, and the convex hull 31 is tightly pressed with the downward punching of the lock hole punch 15 to punch the lock hole 32.

The upper die assembly 1 is arranged in an upper die rotary die disc 4 of the numerical control machine tool, the lower die assembly 2 is arranged in a lower die rotary die disc 6 of the numerical control machine tool, and the top surface of the lower die assembly 2 is higher than the top surface of the lower die rotary die disc 6 by no less than 5 mm. It should be noted that this installation manner of the mold is only one of the prior art.

The upper edge of the forming die 23 is chamfered to form an inclined structure of the edge of the convex hull 31.

The workpiece 3 is a flat plate-shaped structure, the thickness of the workpiece is 1mm, the height of the punched convex hull 31 is 3.3mm, the height of the chamfer part at the edge of the forming die head 23 is 3.4mm, and the length of the downward convex part of the convex hull punch head 14 is 3.4 mm.

When the punching machine works, the stripping spring 16 can be buffered according to different stress requirements of the depth of parameters set by the machine tool, when the stripping spring 16 is pressed by the impact head 5 of the machine tool, the stripping spring is compressed, so that the stripping guide sleeve 13 presses the workpiece 3, the punch continues to punch downwards out of the stripping guide sleeve 13, and when the punch reaches 1/2 of the thickness of the workpiece 3, the depth of the waste material separated from the lower die reaches about 0.5-1.5 mm. After punching, the material stripping spring 16, the punch guide rod 12 and the punch are simultaneously reset while the impact head 5 of the machine tool is reset, and the material stripping guide sleeve 13 is separated from the workpiece 3.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, i.e. the present invention is intended to cover all equivalent variations and modifications within the scope of the present invention.

Claims

1. A kind of punching keyhole compound die structure, including upper die assembly and lower die assembly, the upper die assembly includes the drift, takes off the material guide bush, drift guide arm, takes off the material spring and upper die cutter arbor head, the upper end of drift connects the drift guide arm and forms the lower punching structure, drift and drift guide arm are set up in taking off the material guide bush, the drift is contacted with work piece from the outside of taking off the material guide bush out of the lower end when being impacted; the stripping spring is sleeved outside the punch guide rod, the punch guide rod is connected with the upper die cutter bar head, and the upper die cutter bar head is butted with the machine tool impact head; the lower die combination comprises a lower die base, and a forming die head is arranged on the lower die base, and is characterized in that: the punch comprises a convex hull punch and a lock hole punch, the convex hull punch surrounds the lock hole punch in the middle, and the lock hole punch is slightly recessed in the convex hull punch so as to form a punching structure that the convex hull punch contacts with a workpiece firstly and the lock hole punch contacts with the workpiece later during punching; the top of the forming die head is in a shape matched with the convex hull on the workpiece, a concave lock hole punching concave part is arranged in the middle of the top of the forming die head, the lock hole punching concave part is aligned with the lock hole punch head, and the depth of the lock hole punching concave part is larger than the length of the lock hole punch head below the convex hull punch head.

2. The composite hole-punching die structure as claimed in claim 1, wherein: the lower die assembly also comprises a movable pressure plate, and the movable pressure plate is arranged on the lower die base through a pressure spring to form a structure capable of moving up and down; the upper part of the molding die head is embedded into the movable pressure plate, the top surface of the movable pressure plate is higher than the top surface of the molding die head in the die opening state, and the molding die head protrudes out of the movable pressure plate in the die closing state.

3. The composite hole-punching die structure as claimed in claim 1, wherein: the upper die assembly is arranged in an upper die rotating die disc of the numerical control machine tool, the lower die assembly is arranged in a lower die rotating die disc of the numerical control machine tool, and the top surface of the lower die assembly is higher than the top surface of the lower die rotating die disc by not less than 5 mm.

4. The composite hole-punching die structure as claimed in claim 1, wherein: the upper edge of the forming die head is in a chamfer structure so as to form an inclined structure of the convex hull edge.

5. The composite hole-punching die structure as claimed in claim 4, wherein: the workpiece is of a flat structure, the thickness of the workpiece is 1mm, the height of the punched convex hull is 3.3mm, the height of the chamfer part at the edge of the forming die is 3.4mm, and the length of the downward convex part of the convex hull punch is 3.4 mm.