CN111842768B

CN111842768B - Automatic riveting machine

Info

Publication number: CN111842768B
Application number: CN201910980612.4A
Authority: CN
Inventors: 赵晓云
Original assignee: Ningbo Institute of Finance and Economics
Current assignee: Ningbo Institute of Finance and Economics
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2022-03-08
Anticipated expiration: 2039-10-16
Also published as: CN111842768A

Abstract

The utility model discloses an automatic riveting machine, aiming at providing an offshore construction platform suitable for a pier or an offshore facility with a plane shape similar to a circle, and the technical scheme is characterized in that a left lifting table and a right lifting table which can be adjusted in a lifting way are adopted, so that a workbench can be inclined or lifted due to the height difference of two sides, the adjustment can be conveniently carried out when the processing surface of a workpiece needs to be inclined, and repeated re-clamping is avoided; through level detection mechanism and the control unit, promoted the automation level of riveter, can adjust according to the gradient of work piece machined surface automatically, it is high to the work piece machining efficiency who has a plurality of different angle machined surfaces.

Description

Automatic riveting machine

Technical Field

The utility model relates to the field of machining equipment, in particular to an automatic riveting machine.

Background

With the upgrade of manufacturing, automation is becoming the direction of upgrade for many mechanical manufacturing devices. Riveting is a method of connecting two or more parts or members into a single body by using rivets. The riveting has the advantages of simple process equipment, shock resistance, impact resistance, firmness, reliability and the like, so that the riveting is more and more widely applied to the field of machining.

In recent years, automatic and intelligent riveting machines are also upgraded along with industrial needs, and some automatic riveting machines capable of automatically riveting a plurality of riveting holes on a part are already on the market. However, due to the processing characteristics of the riveting machine, the conventional riveting machine can only rivet the riveting holes in the same processing surface of the workpiece at one time, and when the workpiece is complex and has a plurality of inclined processing surfaces, the workpiece is often manually clamped again for many times, so that the processing efficiency of the riveting machine is greatly reduced, and the workload of workers is increased.

Disclosure of Invention

The utility model aims to solve the problems that when a workpiece is provided with a plurality of inclined processing surfaces in the prior art, the conventional riveting machine needs to re-clamp for many times, so that the processing efficiency is reduced, and the workload of workers is increased.

The technical solution of the present invention is to provide an automatic riveting machine, comprising:

the riveting machine comprises a riveting machine body, wherein the riveting machine body comprises a riveting head and a riveting machine seat, the front and back direction of the riveting machine body is taken as an X axis, and the left and right direction of the riveting machine body is taken as a Y axis;

the workbench is used for mounting a workpiece;

the X-axis translation assembly is mounted on the riveting base and used for driving the workbench to move in the X-axis direction;

the Y-axis translation assembly is arranged on the X-axis translation assembly and is used for driving the workbench to move in the Y-axis direction;

the left lifting table is mounted on the left side of the Y-axis translation assembly, the right lifting table is mounted on the right side of the Y-axis translation assembly, the left lifting table and the right lifting table can vertically lift, and two sides of the workbench are respectively rotatably connected with the left lifting table and the right lifting table;

the horizontal detection device is used for measuring the inclination of the processing surface of the workpiece, the control unit is used for receiving the measured value and driving the left lifting table and/or the right lifting table to lift, and the left lifting table and/or the right lifting table lift to adjust the inclination of the processing surface of the workpiece on the workbench.

Preferably, the X-axis translation assembly includes an X-axis linear guide rail, an X-axis lead screw nut pair and an X-axis support table, the X-axis linear guide rail and the X-axis lead screw nut pair are both arranged on the riveting base along the X-axis direction, and the X-axis support table is slidably connected to the X-axis linear guide rail and driven by the X-axis lead screw nut pair; the Y-axis translation assembly comprises a Y-axis linear guide rail, a Y-axis lead screw nut pair and a Y-axis support platform, the Y-axis linear guide rail and the Y-axis lead screw nut pair are arranged on the X-axis support platform along the Y-axis direction, and the Y-axis support platform is connected to the Y-axis linear guide rail in a sliding mode and driven by the Y-axis lead screw nut pair; the left lifting platform is arranged on the left side of the Y-axis supporting platform, and the right lifting platform is arranged on the right side of the Y-axis supporting platform, so that the workbench can accurately and stably move in the X-axis direction and the Y-axis direction.

Preferably, left elevating platform all includes lifting unit with right elevating platform, lifting unit include fixed connection in Y axle supporting bench's motor, vertical connect in the ball of motor, with ball matched with lead screw slip table, the lead screw slip table still is equipped with the back shaft that sets up along X axle direction, the left and right sides face of workstation all is equipped with slide bearing, slide bearing fit in has the connecting axle, the connecting axle sets up along Y axle direction, the connecting axle is equipped with rod end joint bearing, rod end joint bearing's bearing body with the back shaft cooperatees to make the workstation can go up and down or change the gradient along with the lift of lead screw slip table.

Preferably, the lifting assembly further comprises a guide shaft, the guide shaft is parallel to the ball screw, the bottom end of the guide shaft is fixed to the Y-axis supporting table, and a shaft body of the guide shaft is connected with the screw sliding table in a sliding mode. The guide shaft is arranged, so that the lifting of the screw rod sliding table is more stable, and the influence of overturning moment caused by the weight of the clamp and the workpiece is reduced.

Preferably, the level detection device is a distance sensor, the control unit is a PLC, at least one distance sensor is respectively arranged on each of two sides of the riveting head, the distance sensors are used for measuring the distance between the riveting head and the machined surface of the workpiece, the PLC is used for receiving a measured value and obtaining the inclination of the machined surface of the workpiece, and the motor is controlled to rotate by the PLC, so that the automatic measurement and adjustment of the inclination of the machined surface of the workpiece are realized, the automation level and the working efficiency of the riveting machine are improved, and manual correction is avoided.

Preferably, still include left dwang, right dwang and step motor, left dwang and right dwang are located respectively the left and right sides of riveting head, left dwang and right dwang all rotate through the tip and connect in the riveting frame, left dwang and right dwang rotate by step motor drive and rotate, the free end of left dwang and right dwang all is connected with the cushion, the cushion is used for remedying the machined surface difference in height of work piece. The workpieces with uneven machined surfaces can be detected by selecting cushion blocks with different lengths.

Preferably, the distance sensor is an infrared distance sensor, the upper end face of the cushion block is provided with a reflecting layer matched with the distance sensor, so that the detection precision of the distance sensor is improved, the lower end of the cushion block is conical, the contact area between the cushion block and a workpiece is reduced, and the influence of the inclination of the workpiece on the cushion block is avoided.

After adopting the structure, compared with the prior art, the utility model has the following advantages: through the left lifting platform and the right lifting platform which are adjusted in a lifting mode, the workbench can be inclined or lifted due to the height difference of the two sides, the workpiece machining face can be conveniently adjusted when needing to be inclined or changed in height through the level detection device and the control unit, repeated re-clamping is avoided, and the machining efficiency of workpieces with machining faces of different angles is improved.

Drawings

FIG. 1 is a schematic front view of an automatic riveter of the present invention;

FIG. 2 is a schematic side view of the automatic riveter of the present invention;

FIG. 3 is a schematic view of the connection of the left and right platforms and the work platform of the present invention;

FIG. 4 is a schematic view taken along line A-A in FIG. 2;

FIG. 5 is a schematic side view (dotted line for perspective) of the left and right stages of the utility model;

FIG. 6 is a schematic partial cross-sectional view of region B in FIG. 2;

FIG. 7 is a schematic view of the left or right rotating lever of the present invention rotated to a horizontal position;

fig. 8 is a schematic view of the connection of the connecting rod and spacer of the present invention.

In the drawings: 1-riveting machine body; 11-riveting the joint; 12-riveting the base; 2-a workbench; 21-a connecting shaft; 22-knuckle bearing; 3-X axis translation assembly; 31-X axis linear guide; 32-X axis lead screw nut pair; 33-X axis support table; a 4-Y axis translation assembly; a 41-Y axis linear guide; a 42-Y axis lead screw nut pair; a 43-Y axis support table; 51-a left lifter; 52-right elevating platform; 53-an electric machine; 54-ball screw; 55-screw sliding table; 56-supporting shaft; 57-a guide shaft; 6-level detection means; 61-a distance sensor; 62 a-left swivelling levers; 62 b-a right turning lever; 63-cushion blocks; 7-a protective cover; 8-a workpiece; 81-a first machined surface; 82-second machined surface.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments.

Examples

As shown in fig. 1 and 2, in the automatic riveter of the present invention, a riveter body 1 includes a riveter head 11 and a riveter base 12. The front-back direction of the riveting machine body 1 is taken as an X axis, and the left-right direction of the riveting machine body 1 is taken as a Y axis.

The X-axis translation assembly 3 comprises an X-axis linear guide rail 31, an X-axis lead screw nut pair 32 and an X-axis support table 33, the X-axis linear guide rail 31 and the X-axis lead screw nut pair 32 are both arranged on the riveting machine base 12 along the X-axis direction, the X-axis support table 33 is connected to the X-axis linear guide rail 31 in a sliding mode, and the X-axis support table 33 is driven through the X-axis lead screw nut pair 32 to slide along the X-axis direction.

The Y-axis translation unit 4 includes a Y-axis linear guide 41, a Y-axis screw nut pair 42, and a Y-axis support table 43, the Y-axis linear guide 41 and the Y-axis screw nut pair 42 are both provided on the X-axis support table 33 in the Y-axis direction, and the Y-axis support table 43 is slidably connected to the Y-axis linear guide 41 and is driven by the Y-axis screw nut pair 42 to slide in the Y-axis direction.

As shown in fig. 3, 4, and 5, the left elevating table 51 is attached to the left side of the Y-axis support table 43, and the right elevating table 52 is attached to the right side of the Y-axis support table 43. Left and

right lifters

51, 52 each include a lift assembly. The lifting assembly includes a motor 53, a ball screw 54, a screw slide 55, and a support shaft 56. Motor 53 fixed connection is in Y axle supporting platform 43, and ball 54 sets up vertically and rotates through motor 53 drive, and screw sliding table 55 cooperatees with ball 54 to through the lift of motor 53 drive screw sliding table 55, guaranteed the control accuracy of lift. The support shaft 56 is provided on the side of the screw slide table 55 in the X-axis direction. The outside of lifting unit can also set up protection casing 7 to avoid dust or impurity to lifting unit's influence.

The left side surface and the right side surface of the workbench 2 are both provided with sliding bearings 23, the sliding bearings 23 are fixedly connected with the workbench 2, and the axial direction of the sliding bearings is parallel to the Y axis. The connecting shaft 21 is fitted with a slide bearing 23. The end of the connecting shaft 21 far away from the workbench 2 is provided with a rod end joint bearing 22, and a bearing body of the rod end joint bearing 22 is matched with the supporting shaft 56. The inclination of the workbench 2 can be changed along with the lifting of the screw rod sliding table 55 through the rod end joint bearing 22, and the connecting shaft 21 can be automatically adjusted along with the change of the distance between the lifting sliding tables 55 at the two sides of the workbench 2 through the sliding bearing 23.

Specifically, the lift assembly further includes a guide shaft 57. The bottom end of the guide shaft 57 is fixedly attached to the Y-axis support table 43, and the guide shaft 57 is disposed parallel to the ball screw 54. The lead screw sliding table 55 is provided with the linear bearing 5 matched with the guide shaft 57, so that the bearing capacity of the lead screw sliding table 55 is improved through the guide shaft 57, the lateral moment caused by uneven distribution of workpiece load is reduced, and the stability of the lifting assembly during lifting is enhanced.

As shown in fig. 1, 2, and 6, at least one distance sensor 61 is provided on each of the right and left sides of the rivet head 11. The measuring head of the distance sensor 61 is arranged facing the workpiece 8, the type of the distance sensor 61 is an infrared distance sensor GP2Y0a02YK0F, and the detection distance is 20cm to 100 cm.

The left rotation lever 62a and the right rotation lever 62b are provided on both sides of the rivet head 11. The left rotating rod 62a and the right rotating rod 62b are rotatably connected to the riveting machine base 12 through end portions, and the free ends of the left rotating rod 62a and the right rotating rod 62b are provided with threads. The spacer 63 is provided with a screw, and the spacer 63 is screwed to the free ends of the left and right

rotating levers

62a and 62 b. The left and right

rotating levers

62a and 62b are driven by a stepping motor to rotate. The initial positions of the left rotating rod 62a and the right rotating rod 62b are both vertical, and when the left rotating rod 62a or the right rotating rod 62b rotates clockwise in fig. 2, the lower end of the cushion block 63 will abut against the workpiece 8, and at this time, the upper end surface of the cushion block 63 is opposite to the detection head of the distance sensor 61.

When the same processing surface of the workpiece 8 is uneven or stepped, the height difference is compensated by arranging the spacer block 63 with a corresponding height on the left rotating rod 62a or the right rotating rod 62 b. Specifically, when the right side region of the same processing surface of the workpiece 8 has a stepped projection having a height of 5cm, a spacer 63 having a height of 5cm is attached to the left rotating lever 62 a. When the left rotating rod 62a rotates clockwise until the pad 63 abuts against the workpiece 8, the height difference between the left area and the right area on the same processing surface of the workpiece 8 is compensated, so that the error influence of the height difference of the processing surface on the inclination of the workpiece 8 is avoided.

Specifically, the lower end of the pad block 63 should be designed to be tapered, so as to reduce the contact area between the pad block 63 and the workpiece 8 and prevent the pad block 63 from tilting. The upper end face of the cushion block 63 is provided with a reflective layer matched with the distance sensor 61, so that the detection precision of the distance sensor 61 is improved.

The control unit is a PLC, the input end of the PLC is connected with the distance sensor 61, and the output end of the PLC is connected with the motor 53. The PLC is configured to receive measurement values of the distance sensors 61 on both sides of the rivet head 11, and output a deviation value obtained by comparing the measurement values to the motor 53. The motor 53 drives the screw sliding table 54 to ascend and descend by a corresponding distance according to the deviation value.

The utility model provides an automatic riveting machine, which is specifically used in a way that an operator clamps a workpiece 8 on the upper surface of a workbench 2. At this time, the X-axis translation unit 3 and the Y-axis translation unit 4 are adjusted according to the distance between the first processing surface 81 and the rivet joint 11, so that the table 2 moves in the X-axis or Y-axis direction until the first processing surface 81 moves to a position right below the rivet joint 11. According to the flatness of the first processing surface 81, there are two processing modes:

mode 1: if the first machined surface 81 is relatively flat, the distance sensors 61 on both sides of the rivet head 11 directly measure the distance value to the first machined surface 81, and send the distance value to the PLC. And the PLC obtains a deviation value according to the received distance value. If the distance value of the left side of the riveting head 11 is larger than that of the right side, the PLC outputs a corresponding signal to the motor 53 according to the deviation value of the left side and the right side, so that the screw rod sliding table 55 of the left lifting table 51 is lifted, the screw rod sliding table 55 of the right lifting table 52 is lowered, and the first processing surface 81 is rotated to be horizontal; if the distance value on the left side of the rivet joint 11 is smaller than that on the right side, the PLC outputs a corresponding signal to the motor 54 in the left lifting table 51 according to the deviation value between the distance value and the deviation value, so that the screw rod sliding table 55 of the left lifting table 51 descends, the screw rod sliding table 55 of the right lifting table 52 ascends, and the first processing surface 81 rotates to be horizontal. Then, the riveting head 11 performs riveting processing on the first processing surface 81;

mode 2: if the first machined surface 81 is uneven, the operator selects the cushion block 63 with a corresponding length according to the height difference from the first machined surface 81. The PLC controls the left rotating lever 62a or the right rotating lever 62b to rotate clockwise according to the position shown in fig. 2 until the bottom end of the spacer block 63 abuts against the first processing surface 81. The distance sensor 61 measures the distance value from the top of the pad 63 and sends the distance value to the PLC. After the PLC receives the distance value, the left rotating rod 62a or the right rotating rod 62b is reset, and the PLC outputs a corresponding signal to the motor 53 according to the magnitude of the deviation value, so that the first processing surface 81 rotates to be horizontal. The first processed surface 81 is then riveted by the rivet head 11.

After the first processed surface 81 is riveted, the operator drives the second processed surface 82 to move to the lower side of the rivet head 11, and performs riveting in the same processing manner as the first processed surface 81.

The automatic riveting machine can automatically detect and adjust the inclination of the processing surface of the workpiece, avoids frequently re-clamping the workpiece, reduces the workload of workers and improves the processing efficiency.

The above is the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that any improvements and modifications to the present invention without departing from the principles of the present invention should also be considered within the scope of the present invention by those skilled in the art.

Claims

1. An automatic riveter, characterized by comprising:

the riveting machine comprises a riveting machine body (1), wherein the riveting machine body (1) comprises a riveting head (11) and a riveting machine seat (12), the front and back direction of the riveting machine body (1) is taken as an X axis, and the left and right direction of the riveting machine body (1) is taken as a Y axis;

the workbench (2), the workbench (2) is used for installing a workpiece;

the X-axis translation assembly (3) is mounted on the riveting base (12) and is used for driving the workbench (2) to move in the X-axis direction;

the Y-axis translation assembly (4) is mounted on the X-axis translation assembly (3) and is used for driving the workbench (2) to move in the Y-axis direction;

the left lifting table (51) is installed on the left side of the Y-axis translation assembly (4), the right lifting table (52) is installed on the right side of the Y-axis translation assembly (4), and two sides of the workbench (2) are respectively in rotating connection with the left lifting table (51) and the right lifting table (52);

the horizontal detection device is used for measuring the inclination of the processing surface of the workpiece, the control unit is used for receiving the measured value and controlling the lifting of the left lifting table (51) and/or the right lifting table (52), and the lifting of the left lifting table (51) and/or the right lifting table (52) adjusts the inclination of the processing surface of the workpiece on the workbench (2).

2. An automatic riveting machine according to claim 1, characterized in that: the X-axis translation assembly (3) comprises an X-axis linear guide rail (31), an X-axis lead screw nut pair (32) and an X-axis support table (33), the X-axis linear guide rail (31) and the X-axis lead screw nut pair (32) are arranged on the riveting base (12) along the X-axis direction, and the X-axis support table (33) is connected to the X-axis linear guide rail (31) in a sliding mode and driven by the X-axis lead screw nut pair (32); the Y-axis translation assembly (4) comprises a Y-axis linear guide rail (41), a Y-axis lead screw nut pair (42) and a Y-axis support table (43), the Y-axis linear guide rail (41) and the Y-axis lead screw nut pair (42) are arranged on the X-axis support table (33) along the Y-axis direction, and the Y-axis support table (43) is connected to the Y-axis linear guide rail (41) in a sliding mode and driven by the Y-axis lead screw nut pair (42); the left lifting platform (51) is installed on the left side of the Y-axis supporting platform (43), and the right lifting platform (52) is installed on the right side of the Y-axis supporting platform (43).

3. An automatic riveting machine according to claim 2, characterized in that: left side elevating platform (51) all include lifting unit with right elevating platform (52), lifting unit include fixed connection in motor (53), the vertical connection of Y axle supporting bench (43) in ball (54) of motor (53), with ball (54) matched with lead screw slip table (55), lead screw slip table (55) still are equipped with back shaft (56) along the setting of X axle direction, the left and right sides face of workstation (2) all is equipped with slide bearing, the slide bearing fit in has connecting axle (21), connecting axle (21) set up along Y axle direction, connecting axle (21) are equipped with rod end joint bearing (22), the bearing body of rod end joint bearing (22) with back shaft (56) cooperate.

4. An automatic riveting machine according to claim 3, characterized in that: the lifting assembly further comprises a guide shaft (57), the guide shaft (57) is parallel to the ball screw (54), the bottom end of the guide shaft (57) is fixed on the Y-shaft supporting table (43), and a shaft body of the guide shaft (57) is connected with the screw sliding table (55) in a sliding mode.

5. An automatic riveting machine according to claim 3 or 4, characterized in that: the horizontal detection device is a distance sensor (61), the control unit is a PLC, at least one distance sensor (61) is arranged on each of two sides of the rivet joint (11), the distance sensors (61) are used for measuring the distance between the rivet joint and a machining surface of a workpiece, the PLC is used for receiving a measured value and obtaining the inclination of the machining surface of the workpiece, and the motor (53) is controlled to rotate through the PLC.

6. An automatic riveting machine according to claim 5, characterized in that: still include left dwang (62a), right dwang (62b) and step motor, left side dwang (62a) is located respectively with right dwang (62b) the left and right sides of riveting head (11), left side dwang (62a) all rotates through the tip with right dwang (62b) and connects in riveting frame (12), left side dwang (62a) rotates by step motor drive with right dwang (62b), the free end of left side dwang (62a) and right dwang (62b) all is connected with cushion (63), cushion (63) are used for remedying the machined surface difference in height of work piece.

7. An automatic riveting machine according to claim 6, characterized in that: the distance sensor (61) is an infrared distance sensor, a reflecting layer is arranged on the upper end face of the cushion block (63), and the lower end of the cushion block (63) is conical.