阅读说明：本技术 一种汽车钣金连接件分级冲压成型方法 (Grading punch forming method for automobile sheet metal connecting piece ) 是由 田祥 刘俊豪 于 2019-11-27 设计创作，主要内容包括：本发明公开了一种汽车钣金连接件分级冲压成型方法,涉及冲压加工技术领域,包括以下几个步骤：S1、毛坯安装,将待冲压成型的毛坯安装在冲压成型装置上,对待冲压成型的毛坯进行安装定位,等待冲压成型装置对待冲压成型的毛坯进行冲压成型；S2、翻边冲压,对步骤S1中已安装定位的毛坯两边进行冲压,将毛坯两边折弯形成翻边,得到翻边后的毛坯。本发明在成形槽的顶端两侧对称设置有锁紧杆,对毛坯件进行折弯冲压时,两侧的第一支撑块向型块两边移开,通过锁紧杆将落入成型槽内的毛坯件锁紧,使毛坯件在折弯的过程中对毛坯件的顶端进行压紧,使毛坯件沿型块轮廓折弯,提高连接件的折弯精准度。(The invention discloses a grading punch forming method for an automobile sheet metal connecting piece, which relates to the technical field of punching processing and comprises the following steps: s1, mounting the blank, namely mounting the blank to be subjected to punch forming on a punch forming device, mounting and positioning the blank to be subjected to punch forming, and waiting for the punch forming device to perform punch forming on the blank to be subjected to punch forming; and S2, flanging and punching, namely punching two sides of the blank which is installed and positioned in the step S1, and bending the two sides of the blank to form flanges to obtain the flanged blank. According to the invention, the locking rods are symmetrically arranged on two sides of the top end of the forming groove, when the blank is bent and stamped, the first supporting blocks on two sides are moved away towards two sides of the profile block, the blank falling into the forming groove is locked through the locking rods, so that the top end of the blank is pressed in the bending process, the blank is bent along the profile of the profile block, and the bending accuracy of the connecting piece is improved.)

1. The grading punch forming method for the automobile sheet metal connecting piece is characterized by comprising the following steps of:

s1, mounting the blank, namely mounting the blank to be subjected to punch forming on a punch forming device, mounting and positioning the blank to be subjected to punch forming, and waiting for the punch forming device to perform punch forming on the blank to be subjected to punch forming;

s2, flanging and punching, namely punching two sides of the blank which is installed and positioned in the step S1, and bending the two sides of the blank to form flanges to obtain the flanged blank;

s3, bending and stamping, namely carrying out secondary stamping on the flanged blank in the step S2 to bend the blank from the middle, and bending the blank to a U-shaped structure to obtain a connecting piece formed by stamping;

s4, taking out a finished product, taking out the connecting piece subjected to punch forming in the step S3 from a punch forming device, putting the next blank to be punched, repeating the steps S2-S3, and repeatedly performing punch forming on a plurality of connecting pieces;

the step S1-S4 of the method for graded punch forming of the automobile sheet metal connecting piece is specifically completed by a graded punch forming device of the automobile sheet metal connecting piece, the graded punch forming device of the automobile sheet metal connecting piece comprises a base, the base is a square plate horizontally fixed on the ground, the top end of the base is fixed with two side supporting plates standing upright on the top end of the base, the two side supporting plates are arranged in parallel, the top end of each side supporting plate is transversely fixed with a top supporting plate, the top end of each top supporting plate is provided with a hydraulic cylinder, the bottom end of each hydraulic cylinder extends downwards to form a piston rod, the piston rod penetrates through the top supporting plate to extend downwards, the bottom end of the piston rod of each hydraulic cylinder is fixed with a punching block with a square structure, the middle position of the bottom end of each punching block is provided with a U-shaped groove with, balance rods are symmetrically arranged at the top end of the stamping block and positioned on two sides of the piston rod, the balance rods are vertically fixed at the top end of the stamping block, through round holes are symmetrically arranged at the top end of the top supporting plate and positioned on two sides of the hydraulic cylinder, and the top ends of the balance rods penetrate through the round holes and extend out to the top end of the top supporting plate;

the middle position of the top end of the base is provided with a convex section block, the section block is a square block, the top end of the section block is provided with an arc-shaped surface matched with the U-shaped groove, the top end of the section block is provided with two second positioning blocks, the two second positioning blocks are symmetrically distributed at the top end of the section block in a front-back manner, the left side and the right side of the section block are symmetrically provided with first supporting blocks, opposite surfaces of the first supporting blocks at the two sides are provided with arc edges attached to the section block, the outer sides of the first supporting blocks at the two sides are symmetrically provided with pneumatic cylinders, the top end of the first supporting block at each side is provided with two symmetrical first positioning blocks, the two first positioning blocks are symmetrically distributed at the top end of the first supporting block in a front-back manner, and the first positioning blocks at the two sides of the section block are spliced with the second positioning blocks;

the forming device comprises a first positioning block, a second positioning block, a forming block, a first supporting block, a second supporting block and a forming groove, wherein the forming groove is formed in the top end of the forming block and located at the bottom end of the second positioning block, first guide edges are symmetrically arranged on two sides of the top end of the forming groove and are oblique edges, second guide edges are arranged on opposite surfaces of the first supporting block on two sides, and the second guide edges and the first guide edges are spliced to form a V-shaped opening.

2. The grading punch forming method for the automobile sheet metal connecting piece according to claim 1, wherein the grading punch forming method comprises the following steps: locking holes are symmetrically formed in two sides of the top end of the forming groove, motor grooves are formed in the locking holes in the two sides of the top end of the forming groove, a linear push rod motor is installed in each motor groove, a locking rod is arranged at the output end of the linear push rod motor, and the top end of each locking rod extends into the locking hole in the first guide edge.

3. The grading punch forming method for the automobile sheet metal connecting piece according to claim 1, wherein the grading punch forming method comprises the following steps: the recess of square structure is seted up to the top of base and the left and right sides symmetry that is located the type piece, each side all install the spring block in the recess, the bottom of spring block is provided with the spring, the bottom mounting of spring is at the tank bottom of recess, each side the top of spring block and towards having seted up the hypotenuse in first supporting block direction.

4. The grading punch forming method for the automobile sheet metal connecting piece according to claim 3, wherein the grading punch forming method comprises the following steps: the top end of the spring block is provided with a rolling groove, and a cylindrical roller is arranged in the rolling groove at the top end of the spring block.

5. The grading punch forming method for the automobile sheet metal connecting piece according to claim 1, wherein the grading punch forming method comprises the following steps: the U-shaped groove includes steel bulb, step piece, spring groove, pressure spring, the inner wall equidistant spring groove that is provided with in U-shaped groove, and each spring inslot embedding has the steel bulb, and the top of steel bulb sets up to the button head, and each steel bulb bottom of embedding in the spring inslot is provided with the pressure spring.

Technical Field

The invention relates to the technical field of stamping of automobile sheet metal parts, in particular to a grading stamping forming method for an automobile sheet metal connecting piece.

Background

The automobile metal plate is a technical means for automobile repair, and the automobile metal plate is equal to the automobile metal plate repair, namely the automobile body needs to be repaired after the automobile is collided, namely all other work except spraying work for corrosion prevention and decoration is carried out on the automobile body, such as the analysis of automobile body damage, the measurement of the automobile body, the shaping of the automobile body metal plate, the stretching correction, the stress relief welding, the assembly and the adjustment of automobile body accessories and the like.

The automobile sheet metal connecting piece mainly comprises various components used for connecting two adjacent parts of an automobile, such as a rivet, a bolt, a high-strength bolt, a welding rod, a hinge (pin), various hoops and the like.

Present, a car panel beating stamping device that patent number CN201821797304.5 discloses relates to car panel beating punching press field, including frame and the workstation of setting in the frame, be provided with the punching press die cavity that is used for the punching press on the workstation, be provided with punching press mechanism, stop gear and the link gear that is used for the punching press in the frame, punching press mechanism is including setting up the hydraulic push rod in the frame and rather than continuous punching press head, punching press head and punching press die cavity correspond from top to bottom, stop gear includes two horizontal stoppers that transversely correspond, and two horizontal stoppers all correspond with the position in punching press die cavity. Only the sheet metal material is required to be placed above the stamping die cavity. When the hydraulic push rod pushes the stamping head downwards, the linkage mechanism is utilized to drive the two transverse limiting blocks to clamp and fix the metal plate, the stamping head continues to move downwards to complete stamping, and the stamping device has the advantages of being quick in mounting, accurate in positioning, high in stamping precision and the like, and can effectively meet the requirements of automatic production at the current stage.

The automobile sheet metal stamping device disclosed by the patent still has some defects in actual use, and the specific defects are as follows:

the stamping part needs to be turned over and bent and the like in the actual stamping process, and when the stamping part is placed on a stamping device for stamping, secondary clamping needs to be carried out on the stamping part in the process of turning over and bending the stamping part, the secondary clamping is difficult to guarantee the stamping processing precision, the secondary clamping enables the stamping processing efficiency to be low, and the production speed is low.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a graded punch forming method for an automobile sheet metal connecting piece, which solves the technical problems that secondary clamping is difficult to ensure the punching processing precision, and the secondary clamping causes low punching processing efficiency and low production speed.

The technical problem to be solved by the invention is realized by adopting the following technical scheme: a grading punch forming method for an automobile sheet metal connecting piece comprises the following steps:

s1, mounting the blank, namely mounting the blank to be subjected to punch forming on a punch forming device, mounting and positioning the blank to be subjected to punch forming, and waiting for the punch forming device to perform punch forming on the blank to be subjected to punch forming;

s2, flanging and punching, namely punching two sides of the blank which is installed and positioned in the step S1, and bending the two sides of the blank to form flanges to obtain the flanged blank;

s3, bending and stamping, namely carrying out secondary stamping on the flanged blank in the step S2 to bend the blank from the middle, and bending the blank to a U-shaped structure to obtain a connecting piece formed by stamping;

s4, taking out a finished product, taking out the connecting piece subjected to punch forming in the step S3 from a punch forming device, putting the next blank to be punched, repeating the steps S2-S3, and repeatedly performing punch forming on a plurality of connecting pieces;

the step S1-S4 of the method for graded punch forming of the automobile sheet metal connecting piece is specifically completed by a graded punch forming device of the automobile sheet metal connecting piece, the graded punch forming device of the automobile sheet metal connecting piece comprises a base, the base is a square plate horizontally fixed on the ground, the top end of the base is fixed with two side supporting plates standing upright on the top end of the base, the two side supporting plates are arranged in parallel, the top end of each side supporting plate is transversely fixed with a top supporting plate, the top end of each top supporting plate is provided with a hydraulic cylinder, the bottom end of each hydraulic cylinder extends downwards to form a piston rod, the piston rod penetrates through the top supporting plate to extend downwards, the bottom end of the piston rod of each hydraulic cylinder is fixed with a punching block with a square structure, the middle position of the bottom end of each punching block is provided with a U-shaped groove with, balance rods are symmetrically arranged at the top end of the stamping block and positioned on two sides of the piston rod, the balance rods are vertically fixed at the top end of the stamping block, through round holes are symmetrically arranged at the top end of the top supporting plate and positioned on two sides of the hydraulic cylinder, and the top ends of the balance rods penetrate through the round holes and extend out to the top end of the top supporting plate;

the middle position of the top end of the base is provided with a convex section block, the section block is a square block, the top end of the section block is provided with an arc-shaped surface matched with the U-shaped groove, the top end of the section block is provided with two second positioning blocks, the two second positioning blocks are symmetrically distributed at the top end of the section block in a front-back manner, the left side and the right side of the section block are symmetrically provided with first supporting blocks, opposite surfaces of the first supporting blocks at the two sides are provided with arc edges attached to the section block, the outer sides of the first supporting blocks at the two sides are symmetrically provided with pneumatic cylinders, the top end of the first supporting block at each side is provided with two symmetrical first positioning blocks, the two first positioning blocks are symmetrically distributed at the top end of the first supporting block in a front-back manner, and the positioning blocks at the two sides of the section block are spliced with the second;

the forming device comprises a first positioning block, a second positioning block, a forming block, a first supporting block, a second supporting block and a forming groove, wherein the forming groove is formed in the top end of the forming block and located at the bottom end of the second positioning block, first guide edges are symmetrically arranged on two sides of the top end of the forming groove and are oblique edges, second guide edges are arranged on opposite surfaces of the first supporting block on two sides, and the second guide edges and the first guide edges are spliced to form a V-shaped opening.

As a preferable technical scheme of the present invention, locking holes are symmetrically formed in both sides of the top end of the forming groove, motor grooves are formed in the locking holes in both sides of the top end of the forming groove, a linear push rod motor is installed in the motor grooves, a locking rod is arranged at an output end of the linear push rod motor, and the top end of the locking rod extends into the locking hole of the first guide edge.

As a preferred technical scheme of the invention, the top end of the base, which is positioned on the left side and the right side of the molding block, is symmetrically provided with grooves with square structures, the groove on each side is internally provided with a spring block, the bottom end of the spring block is provided with a spring, the bottom end of the spring is fixed at the bottom of the groove, and the top end of the spring block on each side is provided with an inclined edge facing the direction of the first supporting block.

In a preferred embodiment of the present invention, the spring block has a rolling groove at a top end thereof, and a cylindrical roller is mounted in the rolling groove at the top end of the spring block.

As a preferred technical scheme of the invention, the U-shaped groove comprises a steel ball head, step blocks, spring grooves and a pressure spring, the inner wall of the U-shaped groove is provided with the spring grooves at equal intervals, the steel ball head is embedded in each spring groove, the top end of each steel ball head is provided with a round head, and the bottom end of each steel ball head embedded in the spring groove is provided with the pressure spring.

Compared with the prior art, the invention at least comprises the following beneficial effects:

the middle of the top end of the base is provided with a raised section block, the left side and the right side of the section block are symmetrically provided with first supporting blocks, the outer sides of the first supporting blocks on the two sides are symmetrically provided with pneumatic cylinder drives, the section block above the base is used for downwards punching, a connecting piece placed at the top ends of the section block and the first supporting blocks is punched to enable the connecting piece to be flanged, the bottom end of the punching block is provided with a U-shaped groove with a downward opening, the first supporting blocks on the two sides of the section block driven by the pneumatic cylinder are moved away towards the two sides of the section block, a blank piece fixed at the top end of the section block is subjected to secondary punching through the punching block, the flanged punching piece is subjected to secondary punching through the U-shaped groove to enable the blank piece to be bent to form the connecting piece, the flanging.

Second positioning blocks are symmetrically arranged at the top ends of the profile blocks, two symmetrical first positioning blocks are arranged at the top ends of the first supporting blocks, and the first positioning blocks and the second positioning blocks are spliced to form positioning grooves; the blank is convenient for place, the installation simplicity of blank is improved, the shaping groove has been seted up on the top through the type piece, the top bilateral symmetry in shaping groove is provided with first leading edge, first leading edge is the hypotenuse, the opposite face of the first supporting block of both sides is provided with the second leading edge, the V-arrangement mouth is formed with first leading edge concatenation to the second leading edge, the blank of being convenient for place on the type piece is when the punching press piece is punching press downwards, the blank receives the extrusion force and moves down, the blank is at the in-process of downward movement, the both sides of blank are through the direction of V-arrangement mouth, make blank both sides carry out the turn-ups, the blank falls into the shaping inslot, improve turn-ups precision.

Locking rods are symmetrically arranged on two sides of the top end of the forming groove, when the blank is bent and stamped, the first supporting blocks on the two sides are moved away from two sides of the forming block, the blank falling into the forming groove is locked through the locking rods, the top end of the blank is pressed in the bending process, the blank is bent along the profile of the forming block, and the bending accuracy of the connecting piece is improved.

The square-structure grooves are symmetrically formed in the left side and the right side of the section block at the top end of the base, the spring block is mounted in each groove, the bottom of the blank is supported through the spring block, and the flanging of the blank is locked and supported through the two spring blocks at the bottom and the locking rods, so that the blank is horizontally fixed when the first support blocks at the two sides are moved away, and the stamping accuracy of the connecting piece is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic perspective view of a hierarchical punch forming device for automobile sheet metal connectors according to the present invention;

FIG. 2 is a schematic structural diagram of the work object after punch forming;

FIG. 3 is a schematic structural diagram of a blank member of the present invention during bending and forming of a base;

FIG. 4 is a schematic structural diagram of the first support block and the mold block when they are assembled together according to the present invention;

FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a schematic cross-sectional view of the steel ball of the present invention embedded in a spring groove;

FIG. 7 is a schematic view of the roller of the present invention mounted on the top end of a spring block;

FIG. 8 is a process flow diagram of the automobile sheet metal connector graded punch forming method of the invention;

in the figure: 1. the base, 2, side backup pad, 3, top backup pad, 4, pneumatic cylinder, 5, punching press piece, 6, U-shaped groove, 601, steel ball head, 602, step piece, 603, spring groove, 604, pressure spring, 7, pneumatic cylinder, 8, first locating piece, 9, first supporting piece, 10, type piece, 101, linear push rod motor, 102, motor groove, 103, the check lock lever, 104, the shaping groove, 105, first guiding edge, 11, second locating piece, 12, the hypotenuse, 13, the spring piece, 14, second guiding edge, 15, balancing pole, 16, circular arc limit, 17, the spring, 18, the recess, 19, the roller.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

It will be understood that when an element is referred to as being "secured to" another element, it can be on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.