CN109454473B - Multi-point clamping rotary clamp for energy absorption box - Google Patents

Abstract

The invention discloses a multi-point clamping rotary clamp for an energy-absorbing box, comprising an axle seat, a clamp bottom plate is arranged on the side of the axle seat, a side reference plate is connected to the clamp bottom plate, and a first clamping device and a second clamp are arranged on the side reference plate tighten the device. The fixture realizes two-pin positioning on one side with a reference plane, a side circular hole, and a side waist-shaped slot hole. First place the workpiece on the side reference plate, and the first clamping device drives the first clamping cylinder to start working. Because there are four hook nail pressing plates, the upper and lower ends of each hook nail pressing plate are provided with round nylon indenters , so that the four hook nail pressing plates realize eight-point clamping. Then start the processing program, the solenoid valve (not shown in the figure) starts to work, after the ventilation, the second clamping cylinder is driven to start to work, the second balance rod is driven to move, and the chuck is driven by the connection between the connecting rod and the second pressure plate. The component clamps the workpiece, so that it can smoothly carry out the subsequent hole processing work, the clamping is stable, the deformation is reduced, high-speed cutting can be performed, and four-axis and four-linkage programming can be used to improve efficiency.

Description

Energy-absorbing box multi-point clamping rotary clamp

technical field

The invention relates to a fixture process equipment, in particular to an energy-absorbing box multi-point clamping rotary fixture.

Background technique

The processing of thin-walled parts is very common in the machinery manufacturing industry. The energy absorbing box is a typical thin-walled product. The blank of this product is sawed from the profile, the wall thickness is only 1.2mm, the contour machining allowance is large, and the production task pressure is large. In this case, based on fact-based decision-making, the determination idea is: 1. Reduce the number of clamping and process compound processing. 2. Because it is a thin-walled part, it is determined that the clamping scheme must be multi-point clamping to reduce stress concentration and reduce deformation. 3. High-speed cutting, improve production efficiency and reduce cutting force.

The machining requirements of the workpiece are to machine the side circular holes 23 , the side waist-shaped slot holes 24 , the top circular holes 25 and the contour. In the processing scheme of the prior art, the following steps are generally required:

The first process: Clamping with a machine vise, processing the outline of the reference plane and the face system.

The second process: Clamp with machine-used virtual pliers, process the datum face-to-face plane outline and the side circular holes 23, and mill the side waist-shaped slot holes 24.

The third process: Clamp with machine virtual pliers, and process the top circular hole 25.

The fourth process: clamping with machine virtual pliers, fine milling of reinforcing ribs and part of the contour.

The main problems are as follows;

a. For the processing of a single product, the worker has to clamp four times, and the time for each clamping is 40 seconds; the time required to produce a finished product is 20 minutes (including the clamping time).

b. The scrap rate remains high.

c. In the case of tight time, the pressure of delivery is high, and it is difficult to increase production capacity.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an energy-absorbing box multi-point clamping rotary clamp in view of the deficiencies of the prior art.

In order to solve the above technical problems, the following technical solutions are adopted:

The energy-absorbing box multi-point clamping rotary clamp includes an axle seat, the side of the axle seat is provided with a clamp bottom plate, the clamp bottom plate is connected with a side reference plate, and the side reference plate is provided with a first clamping device and a second clamping device, the first clamping device and the second clamping device. A clamping device acts on the upper part of the workpiece, and a second clamping device acts on the lower part of the workpiece. The first clamping device includes a first clamping cylinder, a first balance rod, a main pressure plate, a hook pressure plate and a round nylon indenter, The first clamping cylinder is fixedly installed on the lower part of the side reference plate, the first clamping cylinder is connected to the middle part of the first balance rod, the two ends of the first balance rod are connected with the main pressure plate, and the top two sides of the main pressure plate are provided with hooks The nail pressing plate, the upper and lower ends of the hooking nail pressing plate are provided with round nylon pressure heads; the second clamping device includes a second clamping cylinder, a second balance rod, a connecting rod, a second pressing plate and a collet assembly, the second clamping The cylinder is arranged on the lower part of the side reference plate, the second clamping cylinder is connected with a second balance rod, the middle part of the second balance rod is connected with the connecting rod, the end of the second balance rod is hinged on the bottom plate of the fixture, and the top of the connecting rod is connected with the connecting rod. In the middle of the second pressing plate, the left end of the second pressing plate acts on the workpiece through the chuck assembly, and the right end of the second pressing plate is hinged on the bottom plate of the fixture.

Further, the collet assembly includes a joint screw, a floating indenter and a nylon block, the upper part of the joint screw is connected to the left end of the second pressing plate, the lower part of the joint screw is connected to the middle of the floating indenter, and the lower parts of both ends of the floating indenter are Equipped with nylon squares, nylon squares act on the workpiece.

Further, a plurality of limit posts are arranged on the side reference plate, and the limit columns are evenly arranged on the side reference plate.

Further, a reinforcing rib is arranged between the fixture bottom plate and the side reference plate.

Further, two sides of the side reference plate are provided with slots, and the slots are matched with the main pressing plate.

Further, the top of the clamp bottom plate is provided with a hinge seat, and the hinge seat is connected to the end of the second pressing plate.

Further, connecting pins are provided between the main pressing plate and the hooking pressing plate.

Due to the adoption of the above technical solution, the following beneficial effects are obtained:

The invention is a multi-point clamping and rotating fixture for an energy-absorbing box, and the fixture realizes two-pin positioning on one side with a reference plane, a side circular hole, and a side waist-shaped slot hole. First place the workpiece on the side reference plate, and the first clamping device drives the first clamping cylinder to start working. Because there are four hook nail pressing plates, the upper and lower ends of each hook nail pressing plate are provided with round nylon indenters , so that the four hook nail pressing plates realize eight-point clamping. Then start the processing program, the solenoid valve (not shown in the figure) starts to work, after the ventilation, the second clamping cylinder is driven to start to work, the second balance rod is driven to move, and the chuck is driven by the connection between the connecting rod and the second pressure plate. The component clamps the workpiece, so that it can smoothly carry out the subsequent hole processing work, the clamping is stable, the deformation is reduced, and high-speed cutting can be performed. Four-axis and four-link programming can be used to improve efficiency.

The fixture has the advantages of simple structure, scientific convenience, strong pertinence, convenient use, low cost, simple operation and easy popularization.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

Fig. 1 is the structural representation of the multi-point clamping rotary clamp of the energy-absorbing box in the present invention;

Fig. 2 is another angle structure schematic diagram of the multi-point clamping rotary clamp of the energy-absorbing box in the present invention;

3 is a schematic structural diagram of a first clamping device in the present invention;

FIG. 4 is a schematic structural diagram of the second clamping device installed on the base plate of the fixture in the present invention;

Fig. 5 is the structural representation of workpiece in the present invention;

FIG. 6 is a schematic structural diagram of the side reference plate of the present invention.

In the figure: 1-axis seat; 2-fixture bottom plate; 3-side reference plate; 4-workpiece; 5-first clamping device; 6-second clamping device; 7-first clamping cylinder; 8-first clamping device 1 balance rod; 9- main pressure plate; 10- hook nail pressure plate; 11- round nylon pressure head; 12- connecting pin; 13- second clamping cylinder; 14- second balance rod; 15- connecting rod; 16- first 2 pressure plate; 17- articulated screw; 18- floating indenter; 19- nylon square; 20- limit post; 21- reinforcing rib; 22- slot; 23- side round hole 23; 24- side waist Slot hole 24; 25-top round hole 25; 26-hinged seat.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention, and not to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.

As shown in Figures 1 to 6, the energy-absorbing box multi-point clamping rotary fixture includes a shaft seat 1, the side of the shaft seat 1 is provided with a clamp bottom plate 2, the clamp bottom plate 2 is connected with a side reference plate 3, and the side reference plate 3 is on the side reference plate 3. A first clamping device 5 and a second clamping device 6 are provided. The first clamping device 5 acts on the upper part of the workpiece 4 and the second clamping device 6 acts on the lower part of the workpiece 4 .

In this embodiment, referring to FIGS. 1 , 2 and 3 , the first clamping device 5 includes a first clamping cylinder 7 , a first balance rod 8 , a main pressing plate 9 , a hook pressing plate 10 and a round nylon pressing head 11 . , the first clamping cylinder 7 is fixedly installed on the lower part of the side reference plate 3, the first clamping cylinder 7 is connected to the middle of the first balance rod 8, and both ends of the first balance rod 8 are connected with the main pressure plate 9, the main pressure plate The top and both sides of the 9 are provided with hooking pressure plates 10. The main pressure plate 9 and the hooking pressure plate 10 are connected by connecting pins 12. The upper and lower ends of the hooking pressure plate 10 are provided with round nylon pressure heads 11. The first clamping cylinder 7 is connected with a solenoid valve (not shown in the figure), and the solenoid valve is used to control the work of the first clamping cylinder 7. The model of the first clamping cylinder 7 is an SDA63-10 cylinder. When the workpiece 4 is placed When reaching the designated position of the side reference plate 3, the workpiece 4 is clamped by the first clamping device 5. The specific working principle is as follows: First, the first clamping cylinder 7 is driven by the solenoid valve to start working, and the first clamping cylinder 7 Push the first balance bar 8 to move, and then the first balance bar 8 drives the main pressure plates 9 at both ends to move. The top and two sides of the two main pressure plates 9 are respectively installed with hook nail pressure plates 10, and the upper and lower ends of the hook nail pressure plates 10 are provided with There is a round nylon indenter 11, the round nylon indenter 11 makes the nail hook pressing plate adaptively contact the surface of the workpiece 4, and clamps the product, so that the four hook nail pressing plates 10 realize eight-point clamping, making it the subsequent workpiece 4 holes The work can be done by machining in place, so that the clamp can be firmly clamped, the deformation of the workpiece 4 can be reduced, and the efficiency can be improved.

In this embodiment, referring to FIG. 1 , FIG. 2 and FIG. 4 , the second clamping device 6 includes a second clamping cylinder 13 , a second balance rod 14 , a connecting rod 15 , a second pressing plate 16 and a collet assembly. Two clamping cylinders 13 are arranged at the lower part of the side reference plate 3 , the second clamping cylinder 13 is connected with a second balance rod 14 , the middle part of the second balance rod 14 is connected with a connecting rod 15 , and the end of the second balance rod 14 is hinged to the On the fixture base plate 2 , the top of the connecting rod 15 is connected to the middle of the second pressure plate 16 , the left end of the second pressure plate 16 acts on the workpiece 4 through the chuck assembly, and the right end of the second pressure plate 16 is hinged on the fixture base plate 2 .

The second clamping cylinder 13 is connected with a solenoid valve (not shown in the figure), and the solenoid valve is used to control the work of the second clamping cylinder 13. The model of the second clamping cylinder 13 is an SDA60-10 cylinder. When the workpiece 4 is placed When it reaches the designated position of the side reference plate 3, the workpiece 4 is preliminarily clamped by the first clamping device 5, and then the second clamping cylinder 13 is driven by the solenoid valve through the second clamping device 6 to start working, and the second clamping cylinder 13 is driven by the first clamping device. The second clamping cylinder 13 pushes the second balance rod 14 to move, and under the connection of the connecting rod 15 and the second pressing plate 16, drives the collet assembly to clamp the workpiece 4, so that the subsequent hole machining work can be smoothly performed, and the clamping It is stable, reduces deformation, can perform high-speed cutting, and can use four-axis four-link programming to improve efficiency.

4, the collet assembly includes a joint screw 17, a floating head 18 and a nylon block 19. The upper part of the joint screw 17 is connected to the left end of the second pressing plate 16, and the lower part of the joint screw 17 is connected to the floating head. In the middle of the 18, the lower parts of both ends of the floating indenter 18 are provided with nylon squares 19, and the nylon squares 19 act on the workpiece 4. By arranging the chuck assembly, nylon blocks 19 are provided at the lower parts of both ends of the floating indenter 18 , and the two nylon blocks 19 act on both ends of the workpiece 4 to realize multi-point clamping of the lower part of the workpiece 4 , which is for the subsequent Prepare for hole machining.

Specifically, referring to FIG. 4 , the top of the clamp bottom plate 2 is provided with a hinge seat 26 , and the hinge seat 26 is connected to the end of the second pressing plate 16 . By setting the hinge seat 26, when the connecting rod 15 drives the second pressing plate 16 to move, the right end of the second pressing plate 16 is limited by the setting of the hinge seat 26, and the entire second pressing plate 16 forms a structure similar to a lever, thereby realizing Clamping work on the lower part of the workpiece 4.

In this embodiment, referring to FIG. 1 , the side reference plate 3 is provided with a plurality of limiting columns 20 , and the limiting columns 20 are evenly arranged on the side reference plate 3 . By arranging several limit posts 20 , the workpiece 4 is just limited within a specific range, so as to better limit the workpiece 4 .

In this embodiment, referring to FIG. 2 , a reinforcing rib 21 is provided between the fixture bottom plate 2 and the side reference plate 3 . The connection strength between the fixture bottom plate 2 and the side reference plate 3 is improved by providing the reinforcing ribs 21 .

In this embodiment, referring to FIG. 6 , two sides of the side reference plate 3 are provided with slots 22 , and the slots 22 are matched with the main pressing plate 9 . By arranging the slot 22, the cross section of the main pressing plate 9 is adapted to the size of the slot 22, so that the movement of the connecting rod main pressing plate 9 can be better realized.

The working principle of the present invention: the fixture realizes two-pin positioning on one side with the reference plane, the side circular hole 23 and the side waist-shaped slot hole 24 . The workpiece 4 is first placed on the side reference plate 3, and the first clamping cylinder 7 is driven by the first clamping device 5 to start working. Because there are four hook-pressing plates 10, the upper and lower ends of each hook-pressing plate 10 are A round nylon pressing head 11 is provided, so that the four hook nail pressing plates 10 can realize eight-point clamping. Then start the processing program, the solenoid valve (not shown in the figure) starts to work, after the ventilation, the second clamping cylinder 13 is driven to start to work, and the second balance rod 14 is driven to move. , drive the collet assembly to clamp the workpiece 4, so that it can smoothly carry out the subsequent hole processing work, the clamping is stable, the deformation is reduced, high-speed cutting can be performed, and the four-axis and four-linkage programming can be used to improve the efficiency.

After on-site testing, the clamping time for a single piece is about 10 seconds; the cutting speed is up to 620 m/min, the feed speed is up to 1300 mm/min, the processing time of this process is 6 minutes, and the machining time of a single product is changed from the original 20 minutes Compressed to within 8 minutes, efficiency increased by 250%!

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention in order to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims (6)

1. The energy-absorbing box multi-point clamping rotary clamp comprises an axle seat, the side of the axle seat is provided with a clamp bottom plate, and the clamp bottom plate is connected with a side reference plate, characterized in that: the side reference plate is provided with a first A clamping device and a second clamping device, the first clamping device acts on the upper part of the workpiece, the second clamping device acts on the lower part of the workpiece, and the first clamping device includes a first clamping cylinder , the first balance rod, the main pressure plate, the hook nail pressure plate and the round nylon pressure head, the first clamping cylinder is fixedly installed on the lower part of the side reference plate, and the first clamping cylinder is connected to the first balance In the middle of the rod, both ends of the first balance rod are connected with a main pressure plate, and both sides of the top of the main pressure plate are provided with hook nail pressure plates, and the upper and lower ends of the hook nail pressure plate are provided with round nylon pressure heads; The second clamping device includes a second clamping cylinder, a second balance rod, a connecting rod, a second pressing plate and a collet assembly, the second clamping cylinder is arranged at the lower part of the side reference plate, the first The two clamping cylinders are connected with a second balance rod, the middle of the second balance rod is connected with the connecting rod, the end of the second balance rod is hinged on the bottom plate of the clamp, and the top of the connecting rod is connected with the second balance rod In the middle of the pressing plate, the left end of the second pressing plate acts on the workpiece through a collet assembly, and the right end of the second pressing plate is hinged on the bottom plate of the fixture; the collet assembly includes a joint screw, a floating indenter and a nylon block, The upper part of the joint screw is connected to the left end of the second pressing plate, the lower part of the joint screw is connected to the middle part of the floating indenter, and the lower parts of the two ends of the floating indenter are provided with nylon squares. Nylon blocks act on the workpiece. 2 . The energy-absorbing box multi-point clamping rotary fixture according to claim 1 , wherein: the side reference plate is provided with a number of limit posts, and the limit posts are evenly arranged on the side reference. 3 . board. 3 . The energy-absorbing box multi-point clamping rotary clamp of claim 1 , wherein a reinforcing rib is provided between the clamp bottom plate and the side reference plate. 4 . 4 . The energy-absorbing box multi-point clamping rotary fixture according to claim 1 , wherein the two sides of the side reference plate are provided with slots, and the slots are matched with the main pressing plate. 5 . 5 . The energy-absorbing box multi-point clamping rotary clamp of claim 1 , wherein the top of the clamp bottom plate is provided with a hinge seat, and the hinge seat is connected to the end of the second pressing plate. 6 . 6 . The multi-point clamping rotary clamp for the energy-absorbing box according to claim 1 , wherein a connecting pin is provided between the main pressing plate and the hooking pressing plate. 7 .

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