阅读说明：本技术 多边异形超薄焊点垫块冷镦全尺寸成型工艺 (Cold-heading full-size forming process for polygonal special-shaped ultrathin welding spot cushion block ) 是由 孙德明 倪平 覃业瑞 于 2019-08-26 设计创作，主要内容包括：本发明公开了多边异形超薄焊点垫块冷镦全尺寸成型工艺,步骤如下：步骤一：剪切线材；步骤二：对剪料进行整形；步骤三：材料流向型镦粗；步骤四：镦外形；步骤五：整形、打焊点、打导向引孔；步骤六：抽孔；步骤七：通废料。(The invention discloses a cold-heading full-size forming process for a polygonal special-shaped ultrathin welding spot cushion block, which comprises the following steps of: the method comprises the following steps: cutting the wire; step two: shaping the cut materials; step three: upsetting the material in a flow direction mode; step four: upsetting the shape; step five: shaping, welding points and guiding holes are punched; step six: drawing the hole; step seven: and (4) introducing waste materials.)

1. The cold heading full-size forming process for the polygonal special-shaped ultrathin welding spot cushion block is characterized in that: the cold heading full-size forming process of the polygonal special-shaped ultrathin welding spot cushion block comprises the following steps:

the method comprises the following steps: cutting the wire rod, and conveying the wire rod to a model position No. 1, wherein the workpiece is cylindrical cut;

step two: shaping the cut materials, conveying the workpieces synchronously swung by the manipulator into a relevant position of a model 2, and enabling the first ends of the workpieces to be of a chamfer structure;

step three: the material flow direction type upsetting, after the workpiece is upset, the manipulator synchronously swings the workpiece and transmits the workpiece into a 3# die working position, and at the moment, the first end of the workpiece is provided with flow direction type stripes;

step four: upsetting the shape, namely after the shape of the workpiece is upset, synchronously swinging the workpiece by a manipulator and conveying the workpiece into a preset position of a No. 4 die, wherein the whole workpiece is of a runway-shaped structure, a plane structure is cut at one pair of symmetrical corners, and the middle part of the first end of the workpiece is provided with a first blind hole structure;

step five: shaping, welding spot welding and guiding lead hole drilling, wherein after the workpiece is shaped and the welding spot and the guiding lead hole are drilled out, the workpiece is synchronously swung by the mechanical arm and is conveyed to the corresponding position of a No. 5 die, a pair of welding spots are symmetrically arranged on the outer edge of the first end of the workpiece, and a second blind hole structure is arranged in the middle of the second end of the workpiece;

step six: drawing holes, wherein after the hole drawing of the workpiece is finished, the workpiece is synchronously swung by the mechanical arm and conveyed into a 6# die fixing position, and at the moment, the second blind hole structure in the middle of the second end of the workpiece is deepened;

step seven: and after the waste material is removed from the inner hole of the workpiece by the punching rod, the first blind hole structure and the second blind hole structure of the workpiece are communicated to form a through hole.

2. The cold-heading full-size forming process for the polygonal special-shaped ultrathin welding spot cushion block as claimed in claim 1, wherein the first step is as follows: the wire rod is cut, the wire rod is pulled in by the wire wheel mechanism, the wire rod passes through the wire die, the backer props against the wire rod for positioning, the hydraulic scissors of the cutting mechanism act to cut the wire rod according to the size, the cut material is clamped by the clamp of the conveying mechanism and is conveyed to the specific position of the model No. 1, and at the moment, the workpiece is cylindrical cut material.

3. The cold-heading full-size forming process for the polygonal special-shaped ultrathin welding spot cushion block as claimed in claim 1, wherein the second step is as follows: the trimming die unit moves integrally during working, the trimming die stamping rod pushes a workpiece to enter a main die cavity, the main die unit is fixed on a machine, the bottom of the die cavity reshapes and chamfers the workpiece, the trimming die unit retreats and resets after operation is completed, the workpiece is pushed out by the main die ejector rod, the clamp manipulator automatically clamps the workpiece, the manipulator synchronously swings the workpiece and is conveyed to a relevant position of a No. 2 die, and at the moment, the first end of the workpiece is in a chamfer structure.

4. The cold-heading full-size forming process for the polygonal special-shaped ultrathin welding spot cushion block as claimed in claim 1, wherein the third step is as follows: the material flows to the type upsetting, the die unit works and moves integrally, the die stamping rod pushes the workpiece to enter the main die cavity, the main die unit is fixed on a machine, the bottom of the die cavity carries out the type upsetting on the material flow of the workpiece, the die unit retreats and resets after the operation is finished, the workpiece is pushed out by the main die ejector rod, the workpiece is automatically clamped by the clamp manipulator, the manipulator synchronously swings the workpiece and is transmitted to the working position of the No. 3 die after the workpiece is upset, and at the moment, the first end of the workpiece has the flow-direction type stripes.

5. The cold-heading full-size forming process for the polygonal special-shaped ultrathin welding spot cushion block as claimed in claim 1, wherein the step four is as follows: upsetting the shape, integrally moving a stamping die unit, pushing a workpiece into a main die cavity by a stamping die punch rod, fixing the main die unit on a machine, upsetting the shape of the workpiece by the bottom of the die cavity, retreating the stamping die unit to reset after operation, pushing the workpiece out by the main die punch rod, automatically clamping the workpiece by a clamp manipulator, synchronously swinging the workpiece by the manipulator to be conveyed into a preset position of a No. 4 die after the shape of the workpiece is upset, wherein the workpiece is integrally in a runway-shaped structure, a plane structure is cut at one pair of symmetrical corners, and a first blind hole structure is arranged in the middle of the first end of the workpiece.

6. The cold-heading full-size forming process for the polygonal special-shaped ultrathin welding spot cushion block as claimed in claim 1, wherein the step five is as follows: shaping welding points and drilling guide holes, wherein the die unit integrally moves in work, a die stamping rod pushes a workpiece to enter a main die cavity, the main die unit is fixed on a machine, the bottom of the die cavity shapes, welds and guides the workpiece, the die unit retreats and resets after the operation is completed, the workpiece is pushed out by a main die ejector rod, a clamp manipulator automatically clamps the workpiece, the workpiece is shaped, welding points are formed in the workpiece, the guide holes are punched, the workpiece synchronously swings by the manipulator and is conveyed to the corresponding position of a No. 5 die, at the moment, the outer edge of the first end of the workpiece is symmetrically provided with a pair of welding points, and the middle part of the second end of the workpiece is provided with a.

7. The cold-heading full-size forming process for the polygonal special-shaped ultrathin welding spot cushion block as claimed in claim 1, wherein the sixth step is: and (3) drawing holes, moving the whole die unit to work, pushing the workpiece into a main die cavity by a die punching rod, fixing the main die unit on a machine, drawing the holes on the workpiece by the punching rod, thinning waste materials, retreating and resetting the die unit after the operation is finished, pushing the workpiece out by a main die ejector rod, automatically clamping the workpiece by a clamp manipulator, synchronously swinging the workpiece by the manipulator after the hole drawing of the workpiece is finished, and transmitting the workpiece into a 6# die fixed position, wherein the second blind hole structure in the middle of the second end of the workpiece is deepened at the moment.

8. The cold-heading full-size forming process for the polygonal special-shaped ultrathin welding spot cushion block as claimed in claim 1, wherein the seventh step is as follows: the punching die unit moves integrally during working, the punching rod of the punching die pushes the workpiece to enter the cavity of the main die, the main die unit is fixed on a machine, after an inner hole of the workpiece is penetrated by the punching rod to remove the waste, the punching die unit retreats and resets, the workpiece is sleeved on the punching rod and taken out together, the workpiece is unloaded by a stripping device on the punching die to fall off and enter a conveyor belt, the whole process is completed, and the first blind hole structure and the second blind hole structure of the workpiece are communicated to form a through hole.

Technical Field

The invention relates to the technical field of automobile production and manufacturing, in particular to a cold-heading full-size forming process for a polygonal special-shaped ultrathin welding spot cushion block.

Background

The multi-edge special-shaped ultrathin parts are often used in the automobile production and manufacturing process, two traditional processes are adopted at present, after cold heading blank is adopted, instrument vehicle is used for drilling and machining or plane vehicle is used for machining, the machining wastes working hours, the cost is increased, the efficiency is low, the production period is long, the size is difficult to guarantee, the quality stability is poor, blank flow lines are cut off, the mechanical strength of the parts is influenced, the parts are prone to cracking due to stress after assembly, the parts tend to lose effectiveness, a cold stamping die form is adopted, a continuous die is adopted, the process die is high in cost, waste materials with a side pressing ring and a middle hole account for more than 60% of raw materials, the material utilization rate is less than 40%, and the cost is too high.

Disclosure of Invention

The invention aims to: in order to solve the problems that the conventional process is generally two, an instrument vehicle is used for drilling a hole after cold heading blank or a plane vehicle is used for thin machining, the repair machining wastes working hours, the cost is increased, the efficiency is low, the production period is long, the size is difficult to guarantee, the quality stability is poor, the blank flow pattern is cut off, the mechanical strength of parts is influenced, the parts are prone to cracking due to stress after assembly, the parts tend to lose effectiveness, a cold stamping die form is adopted, a progressive die is adopted, the cost of the process is high, the waste material has an edge pressing ring and a middle hole which account for more than 60% of raw materials, the material utilization rate is below 40%, and the cost is too high, the cold heading full-size forming process of the polygonal special-shaped.

In order to achieve the purpose, the invention provides the following technical scheme: the cold-heading full-size forming process of the polygonal special-shaped ultrathin welding spot cushion block comprises the following steps:

the method comprises the following steps: cutting the wire rod, and conveying the wire rod to a model position No. 1, wherein the workpiece is cylindrical cut;

step two: shaping the cut materials, conveying the workpieces synchronously swung by the manipulator into a relevant position of a model 2, and enabling the first ends of the workpieces to be of a chamfer structure;

step three: the material flow direction type upsetting, after the workpiece is upset, the manipulator synchronously swings the workpiece and transmits the workpiece into a 3# die working position, and at the moment, the first end of the workpiece is provided with flow direction type stripes;

step four: upsetting the shape, namely after the shape of the workpiece is upset, synchronously swinging the workpiece by a manipulator and conveying the workpiece into a preset position of a No. 4 die, wherein the whole workpiece is of a runway-shaped structure, a plane structure is cut at one pair of symmetrical corners, and the middle part of the first end of the workpiece is provided with a first blind hole structure;

step five: shaping, welding spot welding and guiding lead hole drilling, wherein after the workpiece is shaped and the welding spot and the guiding lead hole are drilled out, the workpiece is synchronously swung by the mechanical arm and is conveyed to the corresponding position of a No. 5 die, a pair of welding spots are symmetrically arranged on the outer edge of the first end of the workpiece, and a second blind hole structure is arranged in the middle of the second end of the workpiece;

step six: drawing holes, wherein after the hole drawing of the workpiece is finished, the workpiece is synchronously swung by the mechanical arm and conveyed into a 6# die fixing position, and at the moment, the second blind hole structure in the middle of the second end of the workpiece is deepened;

step seven: and after the waste material is removed from the inner hole of the workpiece by the punching rod, the first blind hole structure and the second blind hole structure of the workpiece are communicated to form a through hole.

In a preferred embodiment of the present invention, wherein step one: the wire rod is cut, the wire rod is pulled in by the wire wheel mechanism, the wire rod passes through the wire die, the backer props against the wire rod for positioning, the hydraulic scissors of the cutting mechanism act to cut the wire rod according to the size, the cut material is clamped by the clamp of the conveying mechanism and is conveyed to the specific position of the model No. 1, and at the moment, the workpiece is cylindrical cut material.

In a preferred embodiment of the present invention, wherein step two: the trimming die unit moves integrally during working, the trimming die stamping rod pushes a workpiece to enter a main die cavity, the main die unit is fixed on a machine, the bottom of the die cavity reshapes and chamfers the workpiece, the trimming die unit retreats and resets after operation is completed, the workpiece is pushed out by the main die ejector rod, the clamp manipulator automatically clamps the workpiece, the manipulator synchronously swings the workpiece and is conveyed to a relevant position of a No. 2 die, and at the moment, the first end of the workpiece is in a chamfer structure.

In a preferred embodiment of the present invention, wherein step three: the material flows to the type upsetting, the die unit works and moves integrally, the die stamping rod pushes the workpiece to enter the main die cavity, the main die unit is fixed on a machine, the bottom of the die cavity carries out the type upsetting on the material flow of the workpiece, the die unit retreats and resets after the operation is finished, the workpiece is pushed out by the main die ejector rod, the workpiece is automatically clamped by the clamp manipulator, the manipulator synchronously swings the workpiece and is transmitted to the working position of the No. 3 die after the workpiece is upset, and at the moment, the first end of the workpiece has the flow-direction type stripes.

In a preferred embodiment of the present invention, wherein, step four: upsetting the shape, integrally moving a stamping die unit, pushing a workpiece into a main die cavity by a stamping die punch rod, fixing the main die unit on a machine, upsetting the shape of the workpiece by the bottom of the die cavity, retreating the stamping die unit to reset after operation, pushing the workpiece out by the main die punch rod, automatically clamping the workpiece by a clamp manipulator, synchronously swinging the workpiece by the manipulator to be conveyed into a preset position of a No. 4 die after the shape of the workpiece is upset, wherein the workpiece is integrally in a runway-shaped structure, a plane structure is cut at one pair of symmetrical corners, and a first blind hole structure is arranged in the middle of the first end of the workpiece.

In a preferred embodiment of the present invention, wherein step five: shaping welding points and drilling guide holes, wherein the die unit integrally moves in work, a die stamping rod pushes a workpiece to enter a main die cavity, the main die unit is fixed on a machine, the bottom of the die cavity shapes, welds and guides the workpiece, the die unit retreats and resets after the operation is completed, the workpiece is pushed out by a main die ejector rod, a clamp manipulator automatically clamps the workpiece, the workpiece is shaped, welding points are formed in the workpiece, the guide holes are punched, the workpiece synchronously swings by the manipulator and is conveyed to the corresponding position of a No. 5 die, at the moment, the outer edge of the first end of the workpiece is symmetrically provided with a pair of welding points, and the middle part of the second end of the workpiece is provided with a.

In a preferred embodiment of the present invention, wherein step six: and (3) drawing holes, moving the whole die unit to work, pushing the workpiece into a main die cavity by a die punching rod, fixing the main die unit on a machine, drawing the holes on the workpiece by the punching rod, thinning waste materials, retreating and resetting the die unit after the operation is finished, pushing the workpiece out by a main die ejector rod, automatically clamping the workpiece by a clamp manipulator, synchronously swinging the workpiece by the manipulator after the hole drawing of the workpiece is finished, and transmitting the workpiece into a 6# die fixed position, wherein the second blind hole structure in the middle of the second end of the workpiece is deepened at the moment.

In a preferred embodiment of the present invention, wherein step seven: the punching die unit moves integrally during working, the punching rod of the punching die pushes the workpiece to enter the cavity of the main die, the main die unit is fixed on a machine, after an inner hole of the workpiece is penetrated by the punching rod to remove the waste, the punching die unit retreats and resets, the workpiece is sleeved on the punching rod and taken out together, the workpiece is unloaded by a stripping device on the punching die to fall off and enter a conveyor belt, the whole process is completed, and the first blind hole structure and the second blind hole structure of the workpiece are communicated to form a through hole.

Compared with the prior art, the invention has the beneficial effects that: the invention provides a solution for processing multi-edge special-shaped ultrathin parts by cold heading through a novel over-mold method, all sizes are completed by using a cold heading technology, the metal inside a product is streamline and complete and has high strength, one-step forming does not need to be supplemented, the production efficiency of the product is greatly improved, the production process is simplified, the product does not have the cold heading cracking phenomenon, the cold heading scheme of gradually upsetting through a small round material is adopted, namely the multi-edge special-shaped ultrathin parts can be processed by cold heading without drawing section steel in advance through a wire rod like a common round part, the processing cost and the mold cost are effectively saved, the problems of too high cost, complex process and the like of processing the special-shaped ultrathin parts are solved, and the cold heading forming process is environment-friendly and can ensure the sizes of the parts.

Drawings

FIG. 1 is a cross-sectional view of a cold-heading full-size forming process of a polygonal special-shaped ultrathin welding spot cushion block of the invention;

FIG. 2 is a schematic view of step two (process diagram-1) of the present invention.

FIG. 3 is a schematic view of step three (process diagram-2) of the present invention.

FIG. 4 is a schematic diagram of step four (process diagram-3) of the present invention.

FIG. 5 is a schematic view of step five (process diagram-4) of the present invention.

FIG. 6 is a schematic diagram of step six (process diagram-5) of the present invention.

FIG. 7 is a schematic view of step seven (process diagram-6) of the present invention.

Fig. 8 is a two-dimensional view of a product of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the cold-heading full-size forming process for the polygonal special-shaped ultrathin welding spot cushion block comprises the following steps:

the method comprises the following steps: the wire rod is cut, the wire rod is pulled in by the wire wheel mechanism, the wire rod passes through the wire die, the backer props against the wire rod for positioning, the hydraulic scissors of the cutting mechanism act to cut the wire rod according to the size, the cut material is clamped by the clamp of the conveying mechanism and is conveyed to the specific position of the model No. 1, and at the moment, the workpiece is cylindrical cut material.

Referring to fig. 2, step two: the trimming die unit moves integrally during working, the trimming die stamping rod pushes a workpiece to enter a main die cavity, the main die unit is fixed on a machine, the bottom of the die cavity reshapes and chamfers the workpiece, the trimming die unit retreats and resets after operation is completed, the workpiece is pushed out by the main die ejector rod, the clamp manipulator automatically clamps the workpiece, the manipulator synchronously swings the workpiece and is conveyed to a relevant position of a No. 2 die, and at the moment, the first end of the workpiece is in a chamfer structure. The 1# die in this step includes a 1# die back pad, a 1# die, a 1# punch bar, a 1# master die knock-out bar, and a 1# master die back pad, and the workpiece is machined by the 1# die so that the first end of the workpiece 10 is the chamfered structure 11.

Referring to fig. 3, step three: the material flows to the type upsetting, the die unit works and moves integrally, the die stamping rod pushes the workpiece to enter the main die cavity, the main die unit is fixed on a machine, the bottom of the die cavity carries out the type upsetting on the material flow of the workpiece, the die unit retreats and resets after the operation is finished, the workpiece is pushed out by the main die ejector rod, the workpiece is automatically clamped by the clamp manipulator, the manipulator synchronously swings the workpiece and is transmitted to the working position of the No. 3 die after the workpiece is upset, and at the moment, the first end of the workpiece has the flow-direction type stripes. The # 2 die in this step includes a # 2 die back pad, a # 2 die, a # 2 punch bar, a # 2 main die knock-out bar, and a # 2 main die back pad, and the workpiece is machined by the # 2 die so that the first end of the workpiece 10 has the flow-direction pattern striations 12.

With reference to fig. 4, step four: upsetting the shape, integrally moving a stamping die unit, pushing a workpiece into a main die cavity by a stamping die punch rod, fixing the main die unit on a machine, upsetting the shape of the workpiece by the bottom of the die cavity, retreating the stamping die unit to reset after operation, pushing the workpiece out by the main die punch rod, automatically clamping the workpiece by a clamp manipulator, synchronously swinging the workpiece by the manipulator to be conveyed into a preset position of a No. 4 die after the shape of the workpiece is upset, wherein the workpiece is integrally in a runway-shaped structure, a plane structure is cut at one pair of symmetrical corners, and a first blind hole structure is arranged in the middle of the first end of the workpiece. The 3# die in the process comprises a 3# punching push pipe, a 3# punching spring, a 3# punching die rear pad, a 3# punching die, a 3# punching rod, a 3# main die ejector rod and a 3# main die rear pad, the workpiece 10 is integrally processed by the 3# die to be in a runway-shaped structure, plane structures 13a and 13b are cut at a pair of symmetrical corners, and a first blind hole structure 13c is arranged in the middle of the first end of the workpiece.

With reference to fig. 5, step five: shaping welding points and drilling guide holes, wherein the die unit integrally moves in work, a die stamping rod pushes a workpiece to enter a main die cavity, the main die unit is fixed on a machine, the bottom of the die cavity shapes, welds and guides the workpiece, the die unit retreats and resets after the operation is completed, the workpiece is pushed out by a main die ejector rod, a clamp manipulator automatically clamps the workpiece, the workpiece is shaped, welding points are formed in the workpiece, the guide holes are punched, the workpiece synchronously swings by the manipulator and is conveyed to the corresponding position of a No. 5 die, at the moment, the outer edge of the first end of the workpiece is symmetrically provided with a pair of welding points, and the middle part of the second end of the workpiece is provided with a. The 4# die in the process comprises a 4# die back pad, a 4# die, a 4# punch rod, a 4# main die top rod and a 4# main die back pad, and the workpiece is machined by the 4# die so that the outer edge of the first end of the workpiece 10 is symmetrically provided with a pair of welding spots 14a, and the middle part of the second end of the workpiece is provided with a second blind hole structure 14 b.

Referring to fig. 6, step six: and (3) drawing holes, moving the whole die unit to work, pushing the workpiece into a main die cavity by a die punching rod, fixing the main die unit on a machine, drawing the holes on the workpiece by the punching rod, thinning waste materials, retreating and resetting the die unit after the operation is finished, pushing the workpiece out by a main die ejector rod, automatically clamping the workpiece by a clamp manipulator, synchronously swinging the workpiece by the manipulator after the hole drawing of the workpiece is finished, and transmitting the workpiece into a 6# die fixed position, wherein the second blind hole structure in the middle of the second end of the workpiece is deepened at the moment. The # 5 die in the process includes a # 5 die back pad, a # 5 die, a # 5 punch bar, a # 5 main die ejector bar and a # 5 main die back pad, and the # 5 die is used for machining the workpiece so that the second blind hole structure 14b in the middle of the second end of the workpiece 10 is deepened.

With reference to fig. 7, step seven: the punching die unit moves integrally during working, the punching rod of the punching die pushes the workpiece to enter the cavity of the main die, the main die unit is fixed on a machine, after an inner hole of the workpiece is penetrated by the punching rod to remove the waste, the punching die unit retreats and resets, the workpiece is sleeved on the punching rod and taken out together, the workpiece is unloaded by a stripping device on the punching die to fall off and enter a conveyor belt, the whole process is completed, and the first blind hole structure and the second blind hole structure of the workpiece are communicated to form a through hole. The 6# die in the process comprises a 6# die back pad, a 6# die, a 6# punch rod, a 6# main die back pad and a 6# stripper tray, and the 6# die is used for machining the workpiece, so that the first blind hole structure and the second blind hole structure of the workpiece 10 are communicated to form the through hole 15.

The polygonal special-shaped ultrathin welding spot cushion block obtained by final processing is of a runway-shaped structure as a whole, a plane structure 13a and a plane structure 13b are cut at one pair of symmetrical corners, and a pair of welding spots 14a are symmetrically arranged on the outer edge of the first end of the workpiece 10.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.