阅读说明：本技术 一种自动送料铆接装置及其铆接方法 (Automatic feeding riveting device and riveting method thereof ) 是由 张新棋 胡伟前 王德志 李广 董传杰 高银波 于 2018-06-26 设计创作，主要内容包括：本发明涉及一种自动送料铆接装置及其铆接方法。所述自动送料铆接装置包括上料台、弹仓、料盒升降组件、上料组件、送料组件、支撑定位及电机调整组件、铆接组件以及床身。还涉及一种自动送料铆接方法,其工艺流程如下：料盒入仓—上料—定位箱体—送料—铆接。本发明可通过旋转气缸及电磁铁将异型料片准确地送入箱体立边上的待铆接位置处,并完成铆接。解决了现有铆接装置不能避开箱体立边送料的问题,大大提高了铆接装置的自动化程度及生产效率。(The invention relates to an automatic feeding riveting device and a riveting method thereof. The automatic feeding riveting device comprises a feeding table, a magazine lifting assembly, a feeding assembly, a supporting and positioning and motor adjusting assembly, a riveting assembly and a lathe bed. The automatic feeding riveting method comprises the following process flows: feeding a material box into a bin, feeding, positioning a box body, feeding and riveting. The special-shaped material sheet can be accurately fed into the position to be riveted on the vertical edge of the box body through the rotary cylinder and the electromagnet, and riveting is completed. The problem of current riveting set can not avoid the box edgewise pay-off is solved, riveting set's degree of automation and production efficiency have been improved greatly.)

1. The utility model provides an autoloading riveting set which characterized in that: including material loading platform (1), magazine (2), magazine lifting unit (3), material loading subassembly (4), pay-off subassembly (5), support location and motor adjustment subassembly (6), riveting subassembly (7) and lathe bed (8), wherein:

the feeding table (1) is formed by erecting rectangular steel pipes and steel plates, and a plurality of steel ball rollers are embedded in the table surface of the feeding table;

magazine (2) including brace table (9), guide rail (10), slider (11), connecting plate (12), gib block (13), magazine (14) and horizontal push-and-pull cylinder (15), wherein:

the supporting table (9) is fixed on the lathe bed (8), the guide rail (10) and the horizontal push-pull air cylinder (15) are fixed on the supporting table (9), the sliding block (11) is fixed on the lower surface of the connecting steel plate (12) and is in threaded connection with the horizontal push-pull air cylinder (15) through an air cylinder joint, so that the sliding block (11) can move linearly along the guide rail (10) under the action of the horizontal push-pull air cylinder (15);

the guide strip (13) is fixed on the connecting steel plate (12), a plurality of steel ball rollers are embedded on the upper surface of the connecting steel plate (12), and ball plungers (16) are arranged at the tail parts of the guide strip (13);

the material box (14) comprises a material box bottom plate (17), a material sheet positioning vertical plate (18) and a material sheet jacking block (19), wherein the material sheet positioning vertical plate (18) is fixed on the material box bottom plate (17), the material sheet jacking block (19) is not fixedly connected with the material box bottom plate (17), and notches (20) are arranged at corresponding positions on the material box bottom plate (17) and the connecting steel plate (12) so that the material box lifting assembly (3) can directly act on the lower surface of the material sheet jacking block (19);

the magazine lifting assembly (3) comprises a motor (21), an electric servo cylinder (22), a connecting plate (23) and a jacking block connecting plate (24), wherein the connecting plate (23) is mounted on the lathe bed (8), the motor (21) and the electric servo cylinder (22) are both fixed on the connecting plate (23), and the jacking block connecting plate (24) is in threaded connection with an external thread joint of the electric servo cylinder (22);

the feeding assembly (4) comprises a support frame (25), a servo motor (26), a coupler (27), a linear module (28), a cylinder hanging plate (29), a material suction cylinder (30), an electromagnet connecting block (31) and an electromagnet (32), wherein the support frame (25) is arranged on the lathe bed (8), the servo motor (26) and the linear module (28) are both fixed on the support frame (25), the servo motor (26) transmits power to the linear module (28) through the coupler (27), the cylinder hanging plate (29) is fixed on the slide block of the linear module (28), the material suction cylinder (30) is fixed on the cylinder hanging plate (29) and the electromagnet connecting block (31) is fixed at the cylinder joint, a plurality of electromagnets (32) are fixed on the electromagnet connecting block (31);

the feeding assembly (5) comprises a support (33), a clamping jaw driving assembly (34), a guide rail (35), a sliding block (36), a sliding table (37), a rotary cylinder (38), a rotary connecting plate (39), a material sheet supporting block (40) and an electromagnet (41), wherein the support (33) is installed on a lathe bed (8), the guide rail (35) is fixed on the support (33), the clamping jaw driving assembly (34) comprises a screw seat (42), a lead screw and nut assembly (43), a servo motor (44) and a coupler (45), and the screw seat (42) and the servo motor (44) are fixed on the support (33); a sliding block (36) and a nut seat in the clamping jaw driving assembly (34) are fixed on the lower surface of the sliding table (37) so as to be driven by the clamping jaw driving assembly (34) to linearly move along the guide rail (35) through the sliding block (36); the sliding table (37) is also fixedly provided with the rotary cylinder (38), and the rotary connecting plate (39) is fixedly arranged on the rotary cylinder (38); the tablet supporting block (40) is fixed at the end part of the rotary connecting plate, and a plurality of electromagnets (41) are fixed on the tablet supporting block;

the supporting, positioning and motor adjusting assembly (6) comprises a supporting and positioning assembly and a motor adjusting assembly, wherein the supporting and positioning assembly comprises a supporting frame (46), a front positioning block (47), a side positioning plate (48), a side positioning cylinder (49), a guide rail (50), a sliding block (51) and a front positioning cylinder (52); the front positioning block (47), the side positioning cylinder (49) and the guide rail (50) are all installed on the upper surface of the supporting frame (46), the front positioning cylinder (52) is fixed on the side surface of the supporting frame (46), and the side positioning plate (48) is connected to the side positioning cylinder (49) through a cylinder joint so as to be pushed by the side positioning cylinder (49) to move linearly along the guide rail (50) through the sliding block (51) fixed on the lower surface of the side positioning cylinder; the motor adjusting assembly comprises a guide rail base plate (53), a guide rail (54), a sliding block (55), a servo motor (56), a coupler (57), a screw seat (58) and a lead screw and nut assembly (59); the guide rail base plate (53), the servo motor (56) and the screw seat (58) are all mounted on the lathe bed (8), the guide rail (54) is mounted on the guide rail base plate (53), the lead screw and nut assembly (59) is connected with the servo motor (56) through the coupler (57), and the support frame (46) is driven by the motor adjusting assembly to move linearly along the guide rail (54) through a slide block (55) mounted on the lower surface of the support frame and the nut seat in the lead screw and nut assembly (59);

the riveting component (7) comprises a self-made riveter component (60), a riveter installation seat (61), a sliding table (62), a guide rail (63), a sliding block (64), an air cylinder (65) and a base plate (66), wherein the base plate (66) is fixed on the machine body (8), the guide rail (63) is installed on the base plate (66), the air cylinder (65) is fixed on the base plate (66) through an air cylinder lug, the other end of the air cylinder is connected with the sliding table (62) through an air cylinder connector, the riveter installation seat (61) is fixed on the sliding table (62), the self-made riveter component (60) is fixed on the riveter installation seat (61), and the riveter installation seat (61) is pushed by the air cylinder (65) to move linearly along the guide rail (63) through the sliding block (64).

2. The autoloading riveting apparatus of claim 1, wherein: the magazine (14) is provided in plurality, and the size of each magazine (14) is the same or different.

3. The autoloading riveting apparatus of claim 1, wherein: the shape of the material piece jacking block (19) is set according to the shape of the material piece to be riveted.

4. The autoloading riveting apparatus of claim 1, wherein: the shape of the tablet supporting block (40) is arranged corresponding to the shape of the electric suction cup supporting block (31).

5. A riveting method using the autoloading riveting apparatus as set forth in claim 1, comprising the steps of:

step 1, feeding a material box into a bin: the method comprises the following steps that tablets (67) are sequentially placed into a material box (14), two ends of each tablet (67) abut against a tablet positioning vertical plate (18), after the material box (14) is filled, the material box (14) is pushed into a magazine (2) from a feeding table (1) along a guide strip (13), and then a ball plunger (16) on the guide strip (13) clamps the material box (14) to complete positioning of the material box (14);

step 2, feeding: a material suction cylinder (30) in the feeding assembly (4) drives an electromagnet connecting block (31) to move downwards until the material sheet (67) in the material box (14) is sucked and the material sheet (67) is lifted, then under the control of a servo motor (26), the material suction cylinder (30) linearly moves along a linear module (28) until the material sheet reaches the position above a material sheet supporting block (40) in the feeding assembly (5), at the moment, the servo motor (26) is stopped, and the material suction cylinder (30) puts the material sheet (67) on the material sheet supporting block (40) to finish one-time feeding; when the height of the remaining tablets (67) in the material box (14) is lower than the maximum stroke of the material suction cylinder (30), starting a motor (21) in the material box lifting assembly (3) to control a servo electric cylinder (22) to ascend, so that a jacking block connecting disc (24) directly acts on the lower surface of a tablet jacking block (19), and jacking the tablet jacking block (19) to continue feeding; when no material sheet exists in the material box (14), a horizontal push-pull air cylinder (15) in the magazine (2) pushes the connecting steel plate (12) so that the next material box (14) filled with the material sheet (67) can be conveyed to the material suction position, and the actions in the step 2 are repeated;

step 3, positioning the workpiece: placing a box body (68) to be riveted on a support frame (46), and respectively positioning the box body (68) on a front positioning block (47) and a side positioning plate (48) by utilizing a front positioning cylinder (52) and a side positioning cylinder (49);

step 4, feeding: after receiving materials, a clamping jaw driving assembly (34) in a feeding assembly (5) drives a sliding table (37) installed on a sliding block (36) to move to the position of a box body (68) to be riveted, when the sliding table moves to a preset position, a rotary air cylinder (38) installed on the sliding table (37) is started, a rotary connecting plate (39) rotates to a preset angle from the horizontal position, so that a material sheet (67) is driven to be overturned to a position required during riveting, then an electromagnet (41) on a material sheet supporting block (40) is stopped to place the material sheet on the box body (68), the rotary air cylinder (38) is started again to restore the rotary connecting plate (39) to the horizontal position, and then the feeding assembly (5) returns to an initial position;

step 5, riveting: after the material sheet (67) is in place, a cylinder (65) in the riveting assembly (7) is started to push the sliding table (62) to move towards the material sheet (67) along the guide rail (63) through the sliding block (64), and after the sliding table is moved in place, the self-made riveter assembly (60) is started to rivet the material sheet (67) and the box body (68).

6. Riveting method according to claim 5, characterized in that the magazine (68) is placed on the support frame (46) using a robot or other feeding device.

7. The riveting method of an automatic feeding riveting device according to claim 5, wherein the steps 1 to 5 are controlled by a PLC.

Technical Field

The invention relates to the field of automatic production, in particular to an automatic feeding riveting device and a riveting method thereof.

Background

The box body is an important component in the production and manufacturing process of household electrical appliances, and is generally formed by punching, bending, Z-bending, U-bending and other working procedures of a plate material. In the subsequent assembly process of the product, the vertical edge of the bottom of the tank body may need to be placed with a heavy object such as a compressor, and therefore, the vertical edge of the tank body needs to be reinforced. Riveting devices are required in the connection process of the reinforcing part and the vertical edge of the box body.

The yellow bamboo in the Chinese patent with application publication number CN104490355A proposes a riveting device for a dishwasher case and a reinforcing plate, which mainly comprises a base, a single-head riveting seat, a double-head riveting seat, a top riveting seat, a side riveting seat, a double-end limiting seat and the like. The riveting device can effectively complete the positioning and fixing of the box body and the reinforcing plate and complete multiple riveting at the same time. However, the device needs to manually splice the reinforcing plate and the box body, then the box body is supported on the box body supporting frame, the part to be riveted is placed on the lateral riveting seat and the top riveting seat, and then the positioning and the fixing are completed by the device provided in the patent. The method still consumes a large amount of labor, and has low automation degree and low riveting efficiency.

In addition, the box for household appliances is large in size and deep in depth, a common manipulator cannot easily extend into the box from the upper part or the lower part to place a material sheet, and the reinforcing piece used on the vertical edge of the mechanical manipulator is generally in an L-shaped or other non-rectangular thin slice special-shaped shape, so that the special-shaped reinforcing piece cannot be directly fed into a position to be riveted by the existing riveting equipment in the market to be accurately positioned and riveted.

Therefore, an automatic feeding riveting device is needed, which can automatically convey the special-shaped material sheets to the positions to be riveted in the box body in a limited space to complete riveting.

Disclosure of Invention

In order to solve the problems, the invention provides an automatic feeding riveting device and a riveting method thereof.

The technical scheme of the invention is as follows: the utility model provides an autoloading riveting set, includes material loading platform, magazine lifting unit, material loading subassembly, pay-off subassembly, support location and motor adjustment subassembly, riveting subassembly and lathe bed, wherein:

the feeding table is formed by erecting rectangular steel pipes and steel plates, and a plurality of steel ball rollers are embedded in the table surface of the feeding table;

the magazine includes brace table, guide rail, slider, connection steel sheet, gib block, magazine and horizontal push-and-pull cylinder, wherein:

the supporting table is fixed on the lathe bed, the guide rail and the horizontal push-pull air cylinder are fixed on the supporting table, the sliding block is fixed on the lower surface of the connecting steel plate and is in threaded connection with the horizontal push-pull air cylinder through an air cylinder joint, so that the sliding block can linearly move along the guide rail under the action of the horizontal push-pull air cylinder;

the guide strip is fixed on the connecting steel plate, a plurality of steel ball rollers are embedded on the upper surface of the connecting steel plate, and ball plungers are arranged at the tail parts of the guide strip;

the material box comprises a material box bottom plate, a material sheet positioning vertical plate and a material sheet jacking block, wherein the material sheet positioning vertical plate is fixed on the material box bottom plate, the material sheet jacking block is not fixedly connected with the material box bottom plate, and notches are arranged at corresponding positions on the material box bottom plate and the connecting steel plate so that the material box lifting assembly can directly act on the lower surface of the material sheet jacking block;

the material box lifting assembly comprises a motor, a servo electric cylinder, a connecting plate and a jacking block connecting disc, wherein the connecting plate is arranged on the lathe bed, the motor and the servo electric cylinder are fixed on the connecting plate, and the jacking block connecting disc is in threaded connection with an external thread joint of the servo electric cylinder;

the feeding assembly comprises a support frame, a servo motor, a coupler, a linear module, a cylinder hanging plate, a material sucking cylinder, an electromagnet connecting block and an electromagnet, wherein the support frame is installed on the lathe bed, the servo motor and the linear module are fixed on the support frame, the servo motor transmits power to the linear module through the coupler, the cylinder hanging plate is fixed on a sliding block of the linear module, the material sucking cylinder is fixed on the cylinder hanging plate, the electromagnet connecting block is fixed at a cylinder joint of the material sucking cylinder, and a plurality of electromagnets are fixed on the electromagnet connecting block;

the feeding assembly comprises a support, a clamping jaw driving assembly, a guide rail, a sliding block, a sliding table, a rotary cylinder, a rotary connecting plate, a material sheet supporting block and an electromagnet, wherein the support is arranged on a lathe bed, the guide rail is fixed on the support, the clamping jaw driving assembly comprises a screw rod seat, a screw rod and nut assembly, a servo motor and a coupler, and the screw rod seat and the servo motor are fixed on the support; a sliding block and a nut seat in the clamping jaw driving assembly are fixed on the lower surface of the sliding table, so that the sliding block can linearly move along the guide rail under the driving of the clamping jaw driving assembly; the sliding table is also fixedly provided with the rotary cylinder, and the rotary connecting plate is fixed on the rotary cylinder; the tablet supporting block is fixed at the end part of the rotary connecting plate, and a plurality of electromagnets are fixed on the tablet supporting block;

the supporting positioning and motor adjusting assembly comprises a supporting positioning assembly and a motor adjusting assembly, wherein the supporting positioning assembly comprises a supporting frame, a front positioning block, a side positioning plate, a side positioning cylinder, a guide rail, a sliding block and a front positioning cylinder; the front positioning block, the side positioning cylinder and the guide rail are all arranged on the upper surface of the supporting frame, the front positioning cylinder is fixed on the side surface of the supporting frame, and the side positioning plate is connected to the side positioning cylinder through a cylinder joint so as to be pushed by the side positioning cylinder to move linearly along the guide rail through the sliding block fixed on the lower surface of the side positioning cylinder; the motor adjusting assembly comprises a guide rail base plate, a guide rail, a sliding block, a servo motor, a coupler, a screw seat, a lead screw and a nut assembly; the guide rail base plate, the servo motor and the screw seat are all arranged on the lathe bed, the guide rail is arranged on the guide rail base plate, the screw and nut assembly is connected with the servo motor through the coupler, and the support frame is driven by the motor adjusting assembly to do linear motion along the guide rail through a sliding block arranged on the lower surface of the support frame and the nut seat in the screw and nut assembly;

the riveting assembly comprises a self-made riveter assembly, a riveter mounting seat, a sliding table, a guide rail, a sliding block, an air cylinder and a base plate, wherein the base plate is fixed on the lathe bed, and the guide rail is mounted on the base plate; the air cylinder is fixed on the chassis through an air cylinder lug seat, the other end of the air cylinder is connected with the sliding table through an air cylinder joint, the riveter mounting seat is fixed on the sliding table, and the self-made riveter assembly is fixed on the riveter mounting seat; the riveter mounting seat is pushed by the air cylinder to move linearly along the guide rail through the sliding block.

The magazine is provided in plurality, and the size of each magazine is the same or different.

The shape of the material piece jacking block is arranged according to the shape of a material piece to be riveted.

The shape of the tablet supporting block is arranged corresponding to the shape of the electric sucker supporting block.

A riveting method of an automatic feeding riveting device comprises the following steps:

step 1, feeding a material box into a bin: the material sheets are sequentially placed into a material box, two ends of each material sheet are respectively abutted against a material sheet positioning vertical plate, after the material box is filled, the material box is pushed into a magazine from a material loading table along a guide strip, and then a ball plunger on the guide strip clamps the material box to complete the positioning of the material box;

step 2, feeding: a material suction cylinder in the feeding assembly drives an electromagnet connecting block to move downwards until the electromagnet connecting block sucks a material sheet in the material box and lifts the material sheet, then the material suction cylinder linearly moves along a linear module under the control of a servo motor until the material suction cylinder reaches the position above a material sheet supporting block in the feeding assembly, the servo motor is stopped, and the material suction cylinder puts the material sheet on the material sheet supporting block to finish one-time feeding; when the height of the material sheet left in the material box is lower than the maximum stroke of the material suction cylinder, starting a motor in the material box lifting assembly, and controlling the servo electric cylinder to ascend so that the jacking block connecting disc directly acts on the lower surface of the material sheet jacking block, and thus the material sheet jacking block is jacked up and the material feeding is continued; when no material sheet exists in the material box, the horizontal push-pull cylinder in the magazine pushes the connecting steel plate, so that the next material box filled with material sheets can be conveyed to the material sucking position, and the actions in the step 2 are repeated;

step 3, positioning the workpiece: placing a box body to be riveted on a support frame, and respectively positioning the box body on a front positioning block and a side positioning plate by utilizing a front positioning cylinder and a side positioning cylinder;

step 4, feeding: after receiving materials, a clamping jaw driving assembly in a feeding assembly drives a sliding table arranged on a sliding block to move to the position of a box body to be riveted, when the sliding table moves to a preset position, a rotary cylinder arranged on the sliding table is started, a rotary connecting plate rotates to a preset angle from a horizontal position, so that a material sheet is driven to be turned over to a position required by riveting, then an electromagnet on a material sheet supporting block is deactivated to place the material sheet on the box body, the rotary cylinder is started again to restore the rotary connecting plate to the horizontal position, and then the feeding assembly retreats to an initial position;

step 5, riveting: after the material sheet is in place, a cylinder in the riveting assembly is started to push the sliding table to move towards the material sheet along the guide rail through the sliding block, and after the sliding table is moved in place, the self-made riveter assembly is started to rivet the material sheet and the box body.

The box is placed on the support frame using a robot or other feeding device.

And the steps 1 to 5 are controlled by adopting a PLC.

The invention has the following remarkable effects:

(1) the whole riveting process is completed automatically, so that the riveting efficiency is greatly improved;

(2) the special-shaped material sheet is skillfully and accurately conveyed to a position to be riveted on the box body under the condition of not interfering with the vertical edge of the box body, all actions are finished by controlling a servo motor, an air cylinder and the like by a PLC, and the actions are accurate and reliable;

(3) the whole device has compact layout, relatively small volume and low manufacturing cost.

Drawings

A more complete understanding of the present invention's configuration may be derived by referring to the detailed description and claims that follow

Considered in conjunction with the accompanying drawings. In the drawings, like numerals refer to like elements throughout

And (3) a component. The drawings are provided to facilitate an understanding of the present disclosure and are not intended to limit the breadth, scope, scale, or applicability of the present disclosure. The drawings are not necessarily to scale.

FIG. 1 is a layout view of an automatic feed riveting apparatus;

FIG. 2 is a schematic view of the magazine;

figure 3 is a side view of the magazine;

FIG. 4 is a schematic view of the magazine and magazine elevator assembly;

FIG. 5 is a schematic structural view of the feeding assembly;

FIG. 6 is a schematic structural view of a feed assembly;

FIG. 7 is a schematic view of the support positioning and motor adjustment assembly;

FIG. 8 is a schematic structural view of a riveted assembly;

FIG. 9 is a schematic view of the positioning of the magazine on the autoloading riveting apparatus;

FIG. 10 is a schematic view of the operation state of the feeding assembly during material receiving;

fig. 11 is a schematic view of the working state of the feeding assembly after the feeding assembly is fed to the position.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention may be more readily understood by those skilled in the art.

Referring to fig. 1, 2 and 3, a material sheet 67 is sequentially placed into a material box 14, two ends of the material sheet 67 respectively abut against a material sheet positioning vertical plate 18, after the material box 14 is filled, the material box 14 is pushed into a magazine 2 from a feeding table 1 along a guide strip 13, and then a ball plunger 16 on the guide strip 13 clamps the material box 14, so that the positioning of the material box 14 is completed;

referring to fig. 1, 4 and 5, the suction cylinder 30 in the feeding assembly 4 drives the electromagnet connecting block 31 to move downwards until the sheet 67 in the magazine 14 is sucked and the sheet 67 is lifted, and then under the control of the servo motor 26, the suction cylinder 30 moves linearly along the linear die set 28 until the sheet reaches above the sheet supporting block 40 in the feeding assembly 5, at which time the servo motor 26 is deactivated, and the suction cylinder 30 puts the sheet 67 on the sheet supporting block 40, thereby completing one feeding. When the height of the remaining tablets 67 in the magazine 14 is lower than the maximum stroke of the material suction cylinder 30, starting the motor 21 in the magazine lifting assembly 3, controlling the servo electric cylinder 22 to lift, so that the lifting block connecting disc 24 directly acts on the lower surface of the tablet lifting block 19, thereby lifting the tablet lifting block 19, wherein at this time, the magazine bottom plate 17 of the magazine 14 is still clamped by the guide strip 13 and the ball plunger 16, and the tablet lifting block 19 drives the tablets 67 to lift along the tablet positioning vertical plate 18 under the pushing of the lifting block connecting disc 24, so as to continue feeding; when no tablets 67 are in the magazine 14, the horizontal push-pull cylinder 15 in the magazine 2 pushes the connecting steel plate 12, so that the next magazine 14 full of tablets 67 can be conveyed to the material sucking position, and the above actions in step 2 are repeated;

referring to fig. 1, 7 and 9, a box 68 to be riveted is placed on the support frame 46, and the front positioning cylinder 52 and the side positioning cylinder 49 are activated to position the box 68 on the front positioning block 47 and the side positioning plate 48, respectively.

Referring to fig. 6, 9, 10 and 11, after receiving the material, the clamping jaw driving assembly 34 in the feeding assembly 5 drives the sliding table 37 mounted on the sliding block 36 to move to the position of the box 68 to be riveted, when the sliding table moves to a preset position, the rotating cylinder 38 mounted on the sliding table 37 is started to rotate the rotating connecting plate 39 from the horizontal position (shown in an enlarged view in fig. 10) to a preset angle (shown in an enlarged view in fig. 11), so as to drive the material sheet 67 to be turned over to the position required for riveting, then the electromagnet 41 on the material sheet supporting block 40 is stopped to place the material sheet on the vertical edge of the box 68, the rotating cylinder 38 is started again to restore the rotating connecting plate 39 to the horizontal position, and then the feeding assembly 5 returns to the initial position.

Referring to fig. 8 and 9, after the material sheet 67 is in place, the cylinder 65 in the riveting assembly 7 is activated to push the sliding table 62 to move along the guide rail 63 toward the material sheet 67 via the sliding block 64, and after the material sheet is in place, the homemade riveter assembly 60 is activated to rivet the material sheet 67 with the box 68.

It should be understood that the shape of the web in this embodiment is L-shaped, but the shape of the web lifting block 19 may be set according to the shape of the web to be riveted.

While the invention has been described in detail and with reference to the preferred embodiments thereof, it will be apparent to one skilled in the art that various changes in form and detail can be made therein. The details of the preferred embodiments are therefore not to be interpreted as limiting, the invention being intended to be replaced as a whole by the scope of the appended claims.