CN111618231A - Stepping type plate clamping and positioning device of self-punching riveting machine - Google Patents

Stepping type plate clamping and positioning device of self-punching riveting machine Download PDF

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Publication number
CN111618231A
CN111618231A CN202010594159.6A CN202010594159A CN111618231A CN 111618231 A CN111618231 A CN 111618231A CN 202010594159 A CN202010594159 A CN 202010594159A CN 111618231 A CN111618231 A CN 111618231A
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CN
China
Prior art keywords
clamping
plate
plates
scale
self
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CN202010594159.6A
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Chinese (zh)
Inventor
黄志超
张永超
张玉宽
骆强
李玲玲
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East China Jiaotong University
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East China Jiaotong University
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Application filed by East China Jiaotong University filed Critical East China Jiaotong University
Priority to CN202010594159.6A priority Critical patent/CN111618231A/en
Publication of CN111618231A publication Critical patent/CN111618231A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00Riveting
    • B21J15/38Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting
    • B21J15/42Special clamping devices for workpieces to be riveted together, e.g. operating through the rivet holes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00Riveting
    • B21J15/10Riveting machines
    • B21J15/28Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups

Abstract

The invention discloses a stepping type plate clamping and positioning device of a self-piercing riveting machine, wherein a through hole connected with the self-piercing riveting machine is arranged at the center of a riveting platform; the feeding direction is axially vertical to the bidirectional screw rod, a positioning space in the length direction of the plate to be connected is formed between the positioning clamping platform surface and the riveting platform surface in the two clamping plates in the feeding direction, a plate to be connected is positioned through a movable positioning block on the riveting platform, and the other plate to be connected enters the riveting platform through the stepping plate conveying mechanism and controls the lap joint length of the two plate to be connected.

Description

Stepping type plate clamping and positioning device of self-punching riveting machine
Technical Field
The invention belongs to the technical field of machinery, relates to a clamping and positioning device technology, and particularly relates to a plate clamping and positioning device for a self-piercing riveting machine.
Background
The self-piercing riveting technology is a cold joining technology for joining two or more metal or composite material plates. Because the plating layer of the plate is not damaged in the connection process, the connector has the characteristics of reliable performance, low cost, no noise, environmental friendliness and the like, and is widely applied in the fields of automobiles and aviation, and the like, and the technology is mature.
The conventional self-piercing riveting machine consists of a motor, a punch, a blank holder, a C-shaped frame and a female die. The during operation provides power through servo motor and directly impresses the rivet into waiting to rivet the panel, waits that riveting panel and rivet take place plastic deformation under the pressure effect of rivet, and the shaping back is full among the die to form the brand-new panel connection technique of stable connection.
When the conventional self-piercing riveting machine rivets a sheet material, a punch, a rivet and a female die are accurately positioned in the vertical direction, so that the rivet can be ensured to be vertical to the upper surface of the sheet material in the downward stroke motion stage. However, the female die at the bottom of the riveting machine is not provided with any fixing and positioning device, so that the overlapping size of the sheet material needs to be measured in advance, the mark is manually made on the center of the riveted point by using a marking pen, and then the sheet material is placed on the surface of the female die for riveting.
Based on this, in the continuous progress in the prior art, as CN201821922374.9 "a self-piercing riveting fixture device", a main clamp body is matched with a positioning clamping plate to fix a lower substrate of a test piece, a lifting stud is matched with a threaded hole of the main clamp body through threaded connection, a lifting plate is controlled to move up and down according to different plate thicknesses and glue layer thicknesses, a lifting plate boss is in sliding fit with a main clamp body boss to guide the movement of the lifting plate, a specific movement value is marked by a scale mark on the lifting plate boss, a limit baffle controls the degree of freedom of the lifting plate, the clamping plate boss and the lifting plate baffle are in interference fit to fix an upper substrate of the test piece, and self-piercing riveting equipment can perform self-piercing riveting work through a central hole.
CN201820423020.3 & lt & ltA self-piercing riveting auxiliary device & gt, the baffle plates on the upper supporting plate and the lower supporting plate can fix the positions of the upper riveting plate and the lower riveting plate, the lap joint area is determined, pre-marking treatment is not needed, and the centering precision of the self-piercing riveting joint is improved; the plate with different thicknesses can be clamped, and the application range of the plate is expanded.
CN201920798817.6 "a from punching riveting panel quick positioning clamping auxiliary device" can realize that the board of different boards is thick riveting through adjusting the lifter plate, can realize the riveting of the board of different board widths through adjusting bolt I, and closing device can realize the quick clamp, dismantles panel convenient and fast.
In conclusion, the further research and development of the positioning and clamping device of the self-piercing riveting machine can ensure that the riveting operation technology is more standard and the positioning precision is higher. The method is a problem which needs to be solved urgently by the industry and is a premise for further widening the application of the self-piercing riveting process in wider fields.
Disclosure of Invention
The invention aims to provide a clamping and positioning device for a self-piercing riveting machine.
The scheme adopted by the invention for solving the technical problem comprises the following steps:
a self-piercing riveter stepping type plate clamping and positioning device comprises a riveting platform, a positioning and clamping platform, clamping plates, two-way lead screws, a stepping type screw mechanism and a stepping type plate feeding mechanism, wherein a through hole connected with the self-piercing riveter is formed in the center of the riveting platform;
the feeding direction of two plates to be connected is transverse and vertical to the axial direction of the bidirectional screw rod, a positioning space in the length direction of the plates to be connected is formed between the positioning clamping platform surface and the riveting platform surface in the two clamping plates in the feeding direction, a plate to be connected is positioned through a movable positioning block on the riveting platform, and the other plate to be connected enters the riveting platform through the stepping plate conveying mechanism and the lap joint length of the two plates to be connected is controlled by the stepping plate conveying mechanism.
Furthermore, the riveting platform comprises a bottom plate, the positioning and clamping platform comprises two guide rail plates longitudinally arranged up and down and two side plates transversely arranged left and right, a square frame main body is formed among the bottom plate, the guide rail plates and the side plates, and the clamping plate is a clamping scale plate with scales;
the upper edge of the guide rail plate is provided with a guide rail, the middle part of the lower end of the guide rail plate is provided with a groove, and the two grooves and the bottom plate form a transverse feeding groove for receiving plate materials; a female die hole connected with a female die of a self-piercing riveting machine is formed in the center of a bottom plate in the square frame body, clamping scale plates are arranged on the upper guide rail and the lower guide rail, the clamping scale plates are longitudinally and slidably connected with the guide rails, the two side plates and the two clamping scale plates are connected through at least one bidirectional screw rod, and one end of the bidirectional screw rod is connected with the stepping screw mechanism;
relative to the plane transverse center line of the female die hole, the clamping scale plate is symmetrical left and right, the zero scale of the clamping scale plate is aligned with the plane longitudinal center line of the female die hole, and the middle point of the bidirectional screw rod is aligned with the plane transverse center line of the female die hole.
Furthermore, the two ends of the clamping scale plate are connected with the upper and lower guide rails in a longitudinal sliding mode through the sliding blocks.
Furthermore, at least one end of the bottom plate is longitudinally provided with a sliding groove, the bottom of the clamping scale plate is provided with a convex block, the convex block is connected with the sliding groove in a sliding mode or in a yielding mode, and the bottoms of the two side plates and the convex blocks of the two clamping scale plates are connected through a bidirectional screw rod.
Furthermore, the opposite surfaces of the two clamping graduated plates are provided with graduated lines, and the upper surfaces of the clamping graduated plates are provided with graduated scales or scale values.
Further, the riveting platform comprises a positioning seat, the positioning and clamping platform comprises a fixing support, and the clamping plate is a second clamping scale plate with scales;
the positioning seat is of a concave groove structure, a concave die hole connected with a concave die of the self-piercing riveting machine is formed in the center of a groove bottom plate, two second clamping scale plates are arranged on the groove bottom plate of the positioning seat and form longitudinal sliding connection, the fixing support is installed on the positioning seat, and the two second clamping scale plates and the fixing support are connected through at least one second bidirectional screw rod; the two second clamping scale plates are respectively connected with two screw parts in different directions in the second bidirectional screw;
relative to the plane transverse center line of the female die hole, the second clamping scale plate is bilaterally symmetrical, the zero scale of the second clamping scale plate is aligned with the plane longitudinal center line of the female die hole, the middle point of the second bidirectional lead screw is aligned with the plane transverse center line of the female die hole, and the middle part of the second bidirectional lead screw is a lead screw or a polished rod.
Furthermore, two ends of the second clamping scale plate are respectively connected with two ends of the groove bottom plate of the positioning seat in a longitudinal sliding mode through the guide rail sliding block.
Furthermore, the lower end of the guide rail sliding block is provided with a groove, and the groove bottom plate is embedded into the groove to form a sliding groove connecting structure.
Furthermore, the opposite face of two second centre gripping scale plates is equipped with the processing scale mark, and the up end of second centre gripping scale plate corresponds the mark and is equipped with the scale interval, and two second centre gripping scale plates embed respectively has the nut, and nut and the two-way screw rod of second are connected, and the two-way screw rod of second makes two second centre gripping scale plates form the slip of relative direction through being connected with the rotation of nut.
Furthermore, the fixing support is of a herringbone structure, the end faces of the supports on two sides of the herringbone structure are connected with the end faces of the side plates of the two grooves of the positioning seat, the middle part of the fixing support is of a square plate or square frame structure, a deep groove ball bearing is installed in the square plate or square frame structure, a polished rod in the middle part of the second bidirectional lead screw is in interference fit with the deep groove ball bearing, and the middle part of the second bidirectional lead screw is connected with the stepping screw mechanism.
Further, before feeding, the induction device sends out an induction signal to control the stepping screw mechanism to reversely rotate the bidirectional screw rod, and the clamping plates are opened;
after the upper plate and the lower plate are positioned by the movable positioning block and fed by the stepping plate feeding mechanism, the induction device sends out an induction signal to control the stepping screw mechanism to rotate the bidirectional screw rod in the forward direction, and the clamping plates are clamped;
the induction device induces the extrusion force of the two sides of the upper plate and the lower plate, and when the extrusion force reaches a certain value, the induction device sends out an induction signal to control the step-type screw mechanism to stop working;
after the riveting of the upper plate and the lower plate is completed, the induction device sends out an induction signal to control the stepping screw mechanism to reversely rotate the bidirectional screw rod, and the clamping plates are opened.
The clamping and positioning device belongs to a completely symmetrical structure, a zero scale mark on a scale plate passes through the center of a riveting platform at a perpendicular line in the width direction of the bottom surface of a material to be connected, when the material to be connected is required to be clamped, a stepping screw mechanism rotates a bidirectional screw rod to increase the distance between two clamping scale plates, when the distance between the two clamping scale plates is slightly larger than the width of the material to be connected, an upper material and a lower material to be connected are sequentially placed, the material to be connected is directly positioned through a positioning block of the riveting platform, and the other material to be connected enters the riveting platform through a stepping plate conveying mechanism and controls the lap joint length; simultaneously, the two clamping scale plates are provided with scale marks, the lap joint length of two materials to be connected is visually verified, the two-way screw rod is reversely and simultaneously rotated after the lap joint length is determined, when the two materials to be connected are to be clamped, the lap joint length is confirmed again to ensure the accuracy of the lap joint length, and then the two-way screw rod is continuously reversely rotated until the materials to be connected are completely clamped.
(1) The clamping and positioning device of the self-piercing riveting machine can conveniently control the condition that the material to be connected deviates, so that the self-piercing riveting operation technology is more standard.
(2) The invention is marked with a graduated scale, is provided with a guide rail device and a stepping type plate feeding mechanism, namely, the lapping length is automatically controlled, the transverse lapping dimension of the plate materials to be connected can be visually measured, the clamping graduated plate is matched with the stepping type screw mechanism through the motion among the guide rail, the slide block, the bidirectional screw rod, and the stepping type screw mechanism is provided with an induction device, and the accurate positioning of the plate materials to be connected with different widths can be realized.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic cross-sectional view of a bottom plate structure in embodiment 1 of the present invention.
Fig. 3 is a schematic view of a use state of embodiment 1 of the present invention.
Fig. 4 is a schematic three-dimensional assembly of embodiment 2 of the present invention.
Fig. 5 is a schematic view of the positioning seat structure in embodiment 2 of the present invention.
Fig. 6 is a schematic three-view structure diagram of a second clamping scale plate in embodiment 2 of the present invention.
Fig. 7 is a schematic three-view structure diagram of a fixing bracket in embodiment 2 of the invention.
Fig. 8 is a schematic view of a second view structure of a guide rail slider in embodiment 2 of the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the drawings, in which: the axial direction of the bidirectional screw rod is vertical, the axial direction of the bidirectional screw rod is vertical to the transverse direction, and the feeding direction of the plate to be connected is transverse.
Example 1
As shown in the figure, the sheet material clamping and positioning device comprises: the device comprises a bottom plate 1, a screw 2, a guide rail plate 3, a sliding block 4, a side plate 5, a bidirectional screw rod 6, a clamping scale plate 7, a female die hole 8, an upper plate material 9, a lower plate material 10, a stepping screw mechanism 11 and a stepping plate conveying mechanism 12.
The outer side of the side plate 5 is provided with internal threads, the side plate 5 is fastened and connected with the bottom plate 1 through screws, and the side plate 5 is connected with the guide rail plate 3 through screws 2; the upper surface of the clamping scale plate 7 is marked with a scale with the unit of 1mm, the scale value at the center of the clamping scale plate is zero, the scale values are sequentially expanded towards two ends, and the scale marks are led to the bottom at the inner side of the clamping scale plate 7 along the vertical direction, so that the plate receiving materials can move along the transverse direction to be positioned in the lap joint size; the clamping scale plate 7 is connected with the slide block 4 through glue joint, the slide block 4 is connected on the upper part of the clamping scale plate 7, and the slide block 4 is erected on the guide rail plate 3 and can move longitudinally under the action of stress.
When a plate to be connected needs to be clamped, the two bidirectional screw rods 6 are simultaneously rotated clockwise, the distance between the two clamping scale plates 4 is gradually increased, and the increase of the distance between the two clamping scale plates is synchronous due to the use of the bidirectional screw rods 6, so that the working accuracy can be ensured; a female die hole 8 is formed in the center of the bottom plate 1 and used for placing a female die, and the female die hole 8 is connected with the female die of the self-piercing riveting machine in a clearance fit mode.
Six threaded holes are processed on the outer side face of the side plate 5, four threaded holes are processed on two sides of the guide rail plate 3, four threaded holes are processed on two sides of the bottom plate 1, and the threaded holes are used for installing screws to fix the side plate 5, the guide rail plate 3 and the bottom plate 1.
Two bidirectional screw rods 6 are arranged between the side plate 5 and the clamping scale plates 7, the distance between the two clamping scale plates 7 is increased or reduced by synchronously rotating the bidirectional screw rods 6 through a step-type screw mechanism 11 so as to achieve the purpose of clamping a material to be connected, an induction device is arranged in the step-type screw mechanism 11, when the step-type screw mechanism 11 rotates, the clamping scale plates 7 extrude two sides of an upper plate material 9 and a lower plate material 10, when the extrusion force reaches a certain value, the step-type screw mechanism 11 stops working, and the two sides of the upper plate material 9 and the lower plate material 10 are extruded in place; the transverse position of the upper plate 9 is set, the feeding of the lower plate 10 is controlled by the stepping plate feeding mechanism 12, namely, the lap joint length is controlled, and the lap joint length can be visually seen through scales on the clamping scale plate 7.
The upper surface and the inner side surface of the clamping scale plates 7 are provided with scales, the distance between the two clamping scale plates 7 is controlled by rotating the bidirectional screw 6, and the riveting center of a material to be connected and the center of the female die hole 8 can be matched conveniently and quickly.
Example 1 the working procedure is as follows:
as shown in the figure, when a plate to be connected needs to be clamped, the induction device sends an induction signal to control the stepping screw mechanism 11 to reversely rotate the bidirectional screw rod, the stepping screw mechanism 11 rotates the bidirectional screw rod to increase the distance between the two clamping scale plates, when the distance between the two clamping scale plates is slightly larger than the width of the plate to be connected, the stepping plate conveying mechanism 12 sequentially puts in the upper plate or the lower plate to be connected and controls the lap length, the two clamping scale plates are provided with scale marks to visually verify the lap length of the two plate to be connected, after the lap length is determined, the stepping screw mechanism 11 forwardly and simultaneously rotates the bidirectional screw rod, when the two plate to be connected are to be clamped, the lap length is determined again to ensure the accuracy of the lap length, then the bidirectional screw rod is continuously forwardly rotated, when the extrusion force reaches a certain value, the induction device induces the extrusion forces on the two sides of the upper plate 9 and the lower plate, when the extrusion force reaches a certain value, the induction device sends out an induction signal to control the step-type screw mechanism 11 to stop working, and the plate receiving materials are completely clamped;
after the upper plate 9 and the lower plate 10 are riveted, the induction device sends out an induction signal to control the stepping screw mechanism 11 to reversely rotate the bidirectional screw rod, and the clamping plates are opened.
The sensing device and the control system can adopt the prior art, and the embodiment mainly provides a sensing and control process.
Example 2
As shown in fig. 4, the structure includes: the positioning seat 21, the second clamping scale plate 22, the fixing bracket 23, the guide rail slider 24, the nut 25, the deep groove ball bearing 26, the hexagon socket head screw 27 and the second bidirectional lead screw 28.
As shown in fig. 5, the positioning seat 21 is a concave groove structure, and a circular hole, i.e., a concave die hole, is processed in the middle and is assembled with a lower die of the self-piercing riveter; the diameter of the female die hole of the positioning seat 21 is slightly larger than that of the lower die of the self-piercing riveting machine, so that clearance fit is formed.
As shown in fig. 6, the front surface of the second clamping scale plate 22 is provided with scale marks corresponding to the upper end surface, the middle point of the scale marks on the upper end surface is 0, the two sides of the scale marks are respectively 30mm, and the minimum scale mark is 1 mm; a through hole is processed on one side, a second bidirectional screw 28 is installed through a through hole built-in nut 25, and the second bidirectional screw is tightly connected with the guide rail sliding block 24 through a hexagon socket head screw 27.
As shown in fig. 7, the fixing bracket 23 is in a chevron structure, the front end and the rear end of the fixing bracket are welded to the positioning seat 21, a square hole is formed in the middle of the fixing bracket, round holes are formed in the front side and the rear side of the fixing bracket, the deep groove ball bearing 26 is installed in the round holes, and then the second bidirectional lead screw 28 is screwed into the deep groove ball bearing 26 for interference fit.
As shown in fig. 8, the lower end of the guide rail sliding block 24 is grooved, the width of the groove is equal to the thickness of the horizontal plate of the positioning seat 21, and the horizontal plate of the positioning seat 21 is embedded into the grooved part of the guide rail sliding block 24 for assembly. The number of the guide rail sliding blocks 24 is 4, the bottoms of the guide rail sliding blocks 24 are provided with grooves, the guide rail sliding blocks and the horizontal plate of the positioning seat 21 are assembled in a clearance mode, two threaded holes are machined in the outer sides of the guide rail sliding blocks, and the guide rail sliding blocks are fixedly connected with the second clamping scale plate 22 through hexagon socket head screws 27.
The to-be-connected plate is pushed between the second clamping scale plates 22, the to-be-connected plate is pushed to the position of the designated scale mark according to the length of the overlapping area, and under the action of the second bidirectional screw rod 28, the to-be-connected plate is stressed and fastened by the second clamping scale plates 22, so that the positioning in the length direction and the width direction is realized.
The standard component of the hexagon socket head screw 27, the positioning seat 21, the second clamping scale plate 22, the fixing bracket 23 and the guide rail slider 24 are made of low carbon steel material.
Example 2 the procedure was as follows:
and mounting the assembled pre-positioning device on a lower die of the self-piercing riveting machine through a female die hole, wherein the female die hole of the positioning seat 21 is in clearance fit with the die. The second bidirectional screw 28 is installed and positioned with the fixed bracket 23 through the deep groove ball bearing 26, the front side and the rear side of the second bidirectional screw 28 are screwed into the nuts 25 tightly installed on the second clamping scale plate 22, and the second clamping scale plate 22 can move front and back symmetrically through the guide rail sliding block 24 by rotating the second bidirectional screw 28. The plates to be connected are pushed into the space between the second clamping scale plates 22 along the length direction, and the second bidirectional screw 28 is rotated, so that the clamping scale plates 2 can move inwards at the same time, the plates to be connected are clamped, and the positioning along the width direction of the plates is realized. Meanwhile, according to the given connection size, the plate to be connected is continuously pushed to the position of the scale mark on the inner side of the second clamping scale plate 22, so that the positioning along the length direction of the plate is realized, and the accurate pre-positioning of the plate before the self-piercing riveting connection is completed.
Similarly, in embodiment 2, the step screw mechanism 11 and the step plate feeding mechanism 12 can be used.
The distance between the two second clamping scale plates 22 is increased or reduced by synchronously rotating the second bidirectional screw 28 through the stepping screw mechanism 11 so as to achieve the purpose of clamping the plate to be connected, the stepping screw mechanism 11 is provided with an induction device, when the stepping screw mechanism 11 rotates, the second clamping scale plates 22 extrude two sides of the upper plate and the lower plate, when the extrusion force reaches a certain value, the stepping screw mechanism 11 stops working, and the two sides of the upper plate and the lower plate are extruded and aligned in place; the position of the upper plate material in the transverse direction is set, the feeding of the lower plate material is controlled by the stepping plate feeding mechanism 12, namely, the lap joint length is controlled, and the lap joint length can be visually seen through the scales on the second clamping scale plate 22.
In the description of the present invention, it is to be understood that the terms "lateral", "longitudinal", "up", "down", "left", "right", "front", "back", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "mounted" and "connected" are to be interpreted broadly, and specific meanings of the terms in the present invention may be understood by those skilled in the art by specific situations, unless otherwise explicitly specified or limited.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A self-piercing riveter stepping type plate clamping and positioning device comprises a riveting platform, a positioning and clamping platform, clamping plates, two-way lead screws, a stepping screw mechanism (11) and a stepping plate conveying mechanism (12), wherein a through hole connected with the self-piercing riveter is formed in the center of the riveting platform;
the feeding direction of two plates to be connected is transverse and vertical to the axial direction of the bidirectional screw rod, a positioning space in the length direction of the plates to be connected is formed between the positioning clamping platform surface and the riveting platform surface in the two clamping plates in the feeding direction, a plate to be connected is positioned through a movable positioning block on the riveting platform, the other plate to be connected enters the riveting platform through a stepping plate conveying mechanism (12) and the lap joint length of the two plates to be connected is controlled by the stepping plate conveying mechanism (12).
2. The stepping type plate material clamping and positioning device of the self-piercing riveting machine according to claim 1, wherein the riveting platform comprises a bottom plate (1), the positioning and clamping platform comprises two guide rail plates (3) which are vertically and longitudinally arranged and two side plates (5) which are horizontally arranged left and right, a square frame main body is formed among the bottom plate (1), the guide rail plates (3) and the side plates (5), and the clamping plate is a clamping scale plate (7) with scales;
the upper edge of the guide rail plate (3) is provided with a guide rail, the middle part of the lower end of the guide rail plate is provided with a groove, and the two grooves and the bottom plate (1) form a transverse feeding groove for the plates to be connected; a female die hole (8) connected with a female die of a self-piercing riveting machine is formed in the center of a bottom plate (1) in the square frame body, clamping scale plates (7) are arranged on the upper guide rail and the lower guide rail, the clamping scale plates (7) are in longitudinal sliding connection with the guide rails, and the two side plates (5) are connected with the two clamping scale plates (7) through at least one bidirectional screw (6);
relative to the plane transverse center line of the female die hole (8), the clamping scale plate (7) is symmetrical left and right, the zero scale of the clamping scale plate (7) is aligned with the plane longitudinal center line of the female die hole (8), and the middle point of the bidirectional screw rod (6) is aligned with the plane transverse center line of the female die hole (8).
3. The stepping type plate clamping and positioning device of the self-piercing riveting machine according to claim 2, wherein two ends of the clamping scale plate (7) are longitudinally connected with the upper and lower guide rails in a sliding manner through sliding blocks (4).
4. The stepping type plate clamping and positioning device of the self-piercing riveting machine according to claim 2, characterized in that at least one end of the bottom plate (1) is longitudinally provided with a sliding groove, the bottom of the clamping scale plate (7) is provided with a convex block, the convex block is in sliding connection or abdicating connection with the sliding groove, and the bottoms of the two side plates (5) and the convex block of the two clamping scale plates (7) are connected through a bidirectional screw (6).
5. The stepping type plate material clamping and positioning device of the self-punching riveting machine according to claim 1, wherein the riveting platform comprises a positioning seat (21), the positioning and clamping platform comprises a fixing bracket (23), and the clamping plate is a second clamping scale plate (22) with scales;
the positioning seat (21) is of a concave groove structure, a concave die hole connected with a female die of the self-piercing riveting machine is formed in the center of a groove bottom plate, two second clamping scale plates (22) are arranged on the groove bottom plate of the positioning seat (21) and form longitudinal sliding connection, the fixing support (23) is installed on the positioning seat (21), and the two second clamping scale plates (22) and the fixing support (23) are connected through at least one second bidirectional lead screw (28), wherein the two second clamping scale plates (22) are respectively connected with two lead screw parts in different directions in the second bidirectional lead screw (28);
relative to the plane transverse center line of the female die hole, the second clamping scale plate (22) is bilaterally symmetrical, the zero scale of the second clamping scale plate (22) is aligned with the plane longitudinal center line of the female die hole, the middle point of the second bidirectional lead screw (28) is aligned with the plane transverse center line of the female die hole, and the middle part of the second bidirectional lead screw (28) is a lead screw or a polished rod.
6. The stepping type plate clamping and positioning device of the self-piercing riveting machine as claimed in claim 5, wherein two ends of the second clamping scale plate (22) are respectively connected with two ends of the bottom plate of the positioning base (21) in a longitudinal sliding manner through the guide rail sliding blocks (24).
7. The stepping type plate material clamping and positioning device of the self-piercing riveting machine is characterized in that the lower end of the guide rail sliding block (24) is provided with a groove, and a groove bottom plate is embedded into the groove to form a sliding groove connecting structure.
8. The stepping type plate clamping and positioning device of the self-piercing riveting machine is characterized in that machining scale marks are arranged on opposite surfaces of two second clamping scale plates (22), scale values are correspondingly marked on the upper end surfaces of the second clamping scale plates (22), nuts (25) are respectively arranged in the two second clamping scale plates (22), the nuts (25) are connected with a second bidirectional lead screw (28), and the second bidirectional lead screw (28) is connected with the nuts (25) in a rotating mode to enable the two second clamping scale plates (22) to slide in opposite directions.
9. The stepping plate clamping and positioning device of the self-piercing riveting machine as claimed in claim 5 or 8, wherein the fixing support (23) is of a herringbone structure, the end faces of the support at two sides of the herringbone structure are connected with the end faces of the side plates of the two grooves of the positioning seat (21), the middle part of the fixing support (23) is of a square plate or square frame structure, the deep groove ball bearing (26) is installed in the square plate or square frame structure, and the polished rod at the middle part of the second bidirectional screw rod (28) is in interference fit with the deep groove ball bearing (26).
10. The stepping type plate clamping and positioning device of the self-piercing riveting machine according to claim 1, wherein before feeding, the induction device sends out induction signals to control the stepping type screw mechanism (11) to reversely rotate the bidirectional screw rod, and the clamping plates are opened;
after an upper plate material (9) and a lower plate material (10) are positioned by a movable positioning block and fed by a stepping plate feeding mechanism (12), an induction device sends out an induction signal to control a stepping screw mechanism (11) to rotate a bidirectional screw rod in the forward direction, and clamping is carried out between clamping plates;
the induction device induces the extrusion force of the two sides of the upper plate material (9) and the lower plate material (10), and when the extrusion force reaches a certain value, the induction device sends out an induction signal to control the step-type screw mechanism (11) to stop working;
after the upper plate (9) and the lower plate (10) are riveted, the induction device sends out induction signals to control the stepping screw mechanism (11) to reversely rotate the bidirectional screw rod, and the clamping plates are opened.
CN202010594159.6A 2020-06-28 2020-06-28 Stepping type plate clamping and positioning device of self-punching riveting machine Pending CN111618231A (en)

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