CN203140540U - Pipe end circular-arc-shaped gap punching device - Google Patents

Abstract

The utility model discloses a pipe end arc-shaped notch blanking device, which comprises a base, on which a fixed plate is connected, and a replaceable die is inlaid in the fixed plate; There is a tie rod that limits the moving distance of the upper formwork, and a compressive elastic element is set on the tie rod between the upper formwork and the base. The upper formwork is connected with a punch, and the punch is connected with the guide block of the punch. The utility model sets the concave die and the punch (punch) in the same structure, and there is no connection relationship between the punch (punch) and the punching machine, which is beneficial to the positioning of the punched pipe and the operation of the punch (punch). The stroke is short, which is convenient to improve the installation accuracy between the punch (punch) and the die, thereby improving the punching accuracy. The punch resets automatically after punching. Its structure is simple and convenient for arrangement.

Description

Pipe end circular notch punching device

technical field

The utility model belongs to a stamping device, in particular to a circular or rectangular steel pipe end arc-shaped notch punching device.

Background technique

In industries such as steel furniture manufacturing, building scaffolding manufacturing, and decoration, it is usually necessary to weld the end of one round or rectangular steel pipe to the side of another round steel pipe; for beautiful welding, saving welding materials and improving welding efficiency , it is necessary to make a circular arc-shaped notch at the end of the steel pipe, and its radius is equivalent to the outer diameter of the circular steel pipe to be welded therewith. In addition, the diversity of the specifications of the two pipes welded together determines the diversity of the space size of the arc-shaped notch; the provided device must be replaceable to adapt to the diversity of the space size of the arc-shaped notch so as to reduce the production cost. The die of the existing punching device is fixed on the working table of the punching machine through the die base, and the punch (punch) is fixed on the slider of the punching machine. During stamping, the punch (punch) moves together with the punching machine to implement punching and shearing; after stamping, the punch (punch) rises with the slider of the punching machine. The punch (punch) of the above-mentioned connection structure is suitable for blanking flat plate parts. For pipe fittings, when making the arc-shaped notch at the end of the pipe, the punch (punch) must extend into the nozzle. There is a positioning problem between the die and the punch (punch) for the pipe fittings, and the punch and die cannot directly align the pipe fittings. The ends are trimmed. Therefore, the stamping device of the connection structure of the existing punch (punch head) cannot implement the blanking of the pipe end arc-shaped notch to the pipe fitting.

Contents of the invention

The purpose of the utility model is to provide a pipe end arc-shaped notch punching device fixed only to the working table of the punching machine, so as to realize the pipe end arc-shaped notch punching and solve the above-mentioned problems.

The technical scheme of the utility model is: a tube end arc-shaped notch punching device, which includes a base, a fixed plate is connected to the base, and a replaceable die is embedded in the fixed plate; it also includes a movable upper template, the upper template and the base A tie rod is connected between them to limit the moving distance of the upper formwork, and a compressive elastic element is set on the tie rod between the upper formwork and the base. The upper formwork is connected with a punch, and the punch is connected with the guide block of the punch.

The utility model arranges the concave die and the punch (punch) in the same structure, and there is no connection relationship between the punch (punch) and the punching machine, which is beneficial to the positioning of the punched pipe; the operation of the punch (punch) The stroke is short, which is convenient to improve the installation accuracy between the punch (punch) and the die, thereby improving the punching accuracy. The punch resets automatically after punching. Its structure is simple and easy to arrange.

The punch guide block is connected with the base or the fixed plate; the punch guide block is provided with a guide groove in the vertical direction, and the punch is arranged in the guide groove.

The punch (punch) is set in the guide groove to ensure the horizontal position between the punch (punch) and the die, to ensure the accuracy of the punch (punch) operation, and to avoid the punch (punch) being affected by the punch during punching. Force offset, thereby ensuring punching accuracy.

The punch includes two guide connecting lugs arranged vertically on both sides, between the two guide connecting lugs is a stamping support part, the lower end of the stamping support part is provided with a stamping part with an arc-shaped notch at the pipe end; the front end of the stamping support part There is a concave part on the surface to avoid the interference of the pipe end. Under the concave part is a stamping surface protruding from the concave part.

The front face of the stamping support part of the punch (punch) is provided with a structural setting to avoid the interference of the pipe end. The interference between punches) is beneficial to the positioning of the pipe to be punched, and on the other hand, it is beneficial to the punching of the arc-shaped notch at the end of the pipe.

The two guide connecting projections, the stamping support part and the guide groove are connected in cooperation; the cross-sectional shape of the guide groove in the horizontal direction is "T" shape; the preferred two guide connection projections, the stamping support part and the guide groove are connected by sliding fit.

The "T"-shaped structure of the guide groove effectively prevents the punch (punch) from turning over, and can accurately ensure the verticality of the punch.

A die hole is provided on the fixing plate, the die is arranged in the die hole, and the die and the base are connected by screws or bolts.

Embed the die in the positioning hole of the die on the fixed plate in a sliding fit manner to ensure accurate circumferential positioning of the die; the relative position of the guide block of the punch and the fixed plate is fixed to ensure the clearance between the punch and the die edge Stablize.

The end surface of the die is provided with an arc-shaped groove punched out of a pipe-end arc-shaped notch, and the intersection of the groove and the top surface of the die is a punching concave edge.

The top surface of the die is provided with an arc-shaped groove supporting the round pipe, and the intersection of the arc-shaped groove and the groove is a stamping concave edge.

The profiling settings of the punch (punch), the stamping convex edge of the die, the stamping concave edge, and the structure of the stamping surface and the stamping part of the punch (punch) ensure the forming accuracy of the arc-shaped notch at the end of the punched pipe High, good coordination.

The stamping support part is provided with vertical steps.

The stamping support part of the punch (punch) is provided with a vertical step structure to ensure that the guide groove is connected with punches (punches) of various punching sizes to meet the blanking of pipe fittings of different specifications, and to realize punches of different specifications ( Punch) connection versatility.

The vertical gap between the punching concave cutting edge and the punching convex cutting edge is 1.2 to 1.5 times the wall thickness of the punched pipe. .

The utility model has the following characteristics:

Easy installation: the device of the utility model is an independent unit body, and the base only needs to be fixed on the working table of the general press during installation, and the punch (punch) part does not need to be connected with the slider of the general press; the punch ( The gap between the punch) and the cutting edge of the die is guaranteed during manufacture, and no adjustment is required during installation.

Replaceability and wide application range: the utility model only needs to replace the punches and dies in pairs, and can meet the requirements of the diversity of the spatial dimensions of the arc-shaped gaps at the ends of circular or rectangular steel pipes.

Easy to operate: when using the device of the utility model, just slide the steel pipe over the upper surface of the die, insert the nozzle into the stamping surface protruding from the concave part on the front side of the punch (punch), and drive the press to complete the pipe. The production of the arc-shaped notch on the side of the end; the punch (punch) automatically resets under the action of the compression elastic element; after the steel pipe is rotated 180 ゜, it is stamped again to complete the transparency of the arc-shaped notch at the end of the steel pipe make.

Description of drawings

Figure 1 is a schematic diagram of the assembly of the device of the present invention.

Fig. 2 is a schematic diagram of direction A in Fig. 1 .

Figure 3 is a left schematic diagram of Figure 1

Fig. 4 is a structural schematic diagram of a punch for making an arc-shaped notch at the end of a circular steel pipe.

Fig. 5 is a schematic diagram of the structure of the die for making the arc-shaped notch at the end of the circular steel pipe.

Fig. 6 is a structural schematic view of another punch for making a circular arc-shaped notch at the end of a circular steel pipe.

Fig. 7 is a schematic diagram of the structure of the punch used to make the arc-shaped notch at the end of the rectangular steel pipe.

Fig. 8 is a schematic diagram of the structure of the die for making the arc-shaped notch at the end of the rectangular steel pipe.

Detailed ways

As shown in Figure 2, the base 5 is connected with the fixed plate 4 through the screw 7 and the positioning pin 6;

As shown in Figure 2, the front part of the fixed plate 4 is provided with a die positioning hole 3, and a die 8 is placed in the die positioning hole 3, and the die 8 is connected with the die positioning hole 3 by a sliding fit, and through the connecting screw 2 is fixed on the base 5; the base 5 is provided with a leakage hole 10.

As shown in FIG. 1 , a tie rod 13 is connected between the upper template 18 and the fixing plate 4 . In this embodiment, the tie rod 13 passes through the upper template 18 and limits the position of the upper template 18 . The lower part is connected with the fixing plate 4 through threads. A compressive elastic element 14 is sheathed on the pull rod 13 between the upper template 18 and the fixed plate 4 .

The punch (punch) 15 is connected with the upper template 18 by screws 16 .

As shown in FIG. 2 , the punch guide block 1 is provided with a longitudinal non-closed straight-through guide groove 17 , and the cross-sectional shape of the guide groove in the horizontal direction is "T" shape. There are two symmetrical grooves 1.1 on the left and right sides of the upper guide groove 17 of the punch guide block 1; two symmetrical bumps 15.1 are arranged on the left and right sides of the punch (punch) 15; two symmetrical grooves 1.1 and two symmetrical bumps 15.1 The vertical direction is connected by sliding fit.

The punch includes two guide connecting lugs arranged vertically on both sides, between the two guide connecting lugs is a stamping support part, the lower end of the stamping support part is provided with a stamping part with a pipe end arc-shaped notch; the front end of the stamping support part is provided with There is a concave part to avoid the interference of the pipe end. Below the concave part is a punching surface protruding from the concave part. The intersection of the punching surface and the punching part is a punching convex edge with a circular arc-shaped notch on the tube end.

For the applicable punch (punch) used to make the circular arc-shaped notch at the end of the circular pipe with the largest diameter, as shown in Figures 2, 3, and 4, the two sides 23 of the punch (punch) 15 and the upper guide groove of the punch guide block 1 17 is connected in a sliding fit in the horizontal direction; the two guide connecting protrusions 15.1 vertically arranged on both sides of the punch and the groove 1.1 are connected in a sliding fit in the vertical direction; the stamping support part is between the two guiding connecting protrusions , the front end surface of the stamping support part is provided with a recessed part 22 to avoid the interference of the pipe end. Under the recessed part 22 is a stamping surface 21 protruding from the recessed part. The outer diameter of the tube.

The lower end of the stamping support part is provided with a stamping part 19 with a circular arc-shaped notch at the end of the pipe. The stamping part 19 is in a convex circular arc shape, and its radius is the inner diameter of the processed circular tube.

The intersection line 20 between the stamping surface 21 and the two arc surfaces of the stamping part 19 is the convex cutting edge of stamping; the concave part 22 in the structure of the punch (punch) 15 is not only the placement space for the processed pipe end, but also limits the processing of the round pipe. The role of the end position.

The end surface of the die is provided with an arc-shaped groove punched out of a pipe-end arc-shaped notch, and the intersection of the groove and the top surface of the die is a punching concave edge.

As shown in Figure 1, the vertical gap between the stamping concave edge and the stamping convex edge is 1.2 to 1.5 times the wall thickness of the punched tube.

As shown in Figure 5, it is the used die for making the arc-shaped notch of the circular pipe end. An arc surface 26 is arranged at the center of the front side of the die 8, and its radius is the radius of the arc shape 21 on the front side of the punch + punching gap; an arc surface 27 is arranged at the center of the upper surface of the die 8, and its radius is slightly larger than the processed circle. The external diameter of shaped tube; The line of intersection 28 of two arc surfaces 26,27 is the stamping concave edge.

As shown in Figures 2 and 6, it is the punch used for making the smaller diameter circular pipe end arc-shaped notch applicable to the utility model. The mating surface 23 between the punch (punch) 29 of the second structure and the guide groove 17 on the punch guide block 1 remains unchanged, and the step 30 is designed according to the reduction of the radius of the processed circular tube.

As shown in FIG. 7 , in order to make the punch used for the arc-shaped notch at the end of the rectangular pipe, the stamping part (bottom) 32 of the punch (punch) 31 of the third structure is designed as a plane.

As shown in Figure 8, in order to make the concave die of the second structure used for the circular arc-shaped notch of the rectangular pipe end, the upper surface of the concave die 33 is designed as a plane; the punching concave edge 34 is a plane curve.

As shown in Figures 5 and 8, two symmetrical countersunk through holes 24 and two symmetrical countersunk threaded holes 25 are provided along the diagonal line on the die, and the small diameter of the thread is larger than the diameter of the through hole. When the die 8 is fixed on the base 5, the connecting screw 2 passes through these two types of countersunk holes.

As shown in Figures 1 and 3, during installation, only the base 5 of the device of the present invention needs to be fixed on the working table of the universal press, and the punch part does not need to be connected with the slider of the universal press; during work, slide the steel pipe through On the upper surface of the die, insert its nozzle into the end wall of the tube in the punching surface 21 protruding from the concave part on the front side of the punch and stick to the bottom surface of the concave part 22 of the punch, drive the press, and the slider of the press goes down and slaps On the upper template 18, the compression-type elastic element 14 is compressed, and the punch goes down, and the arc-shaped notch on one side of the pipe end is completed; the punch resets automatically under the action of the compression-type elastic element 14; after the steel pipe is rotated 180°, Stamping again can complete the transparent production of the arc-shaped gap at the end of the steel pipe.

When changing the punch (punch) 15, only need to pull down the pull bar 13 earlier, then the punch (punch) 15 is unloaded from the upper template 18, and finally other punches are installed.

When replacing the die, first remove the connecting screw 2, then screw a pair of screws with a nominal diameter larger than the connecting screw 2 into the countersunk threaded hole, lift the pair of screws evenly, and then the die can be lifted to replace other dies.

Claims (11)

1. pipe end circular arc cutaway blanking apparatus, it comprises base, is connected and fixed plate on the base, inlays removable die in the fixed head; It is characterized in that it also comprises mobile cope match-plate pattern, be connected with the pull bar that limits cope match-plate pattern displacement between cope match-plate pattern and the base, be arranged with compression class flexible member on the pull bar between cope match-plate pattern and the base, cope match-plate pattern is connected with punch, and punch is connected with the punch guide pad.

2. pipe end circular arc cutaway blanking apparatus according to claim 1 is characterized in that described punch guide pad is connected with base or fixed head; The punch guide pad offers gathering sill at vertical direction, and punch is located in the gathering sill.

3. pipe end circular arc cutaway blanking apparatus as claimed in claim 1 or 2, it is characterized in that described punch comprises that vertical two guiding that arrange in both sides connect projection, it is the punching press support portion that two guiding connect between the projection, and the pressing part of pipe end circular arc cutaway is established in bottom, punching press support portion; The front end face of punching press support portion is provided with the depressed part of avoiding pipe end to interfere, and for protruding from the stamping surface of depressed part, the intersection of stamping surface and pressing part is the protruding cutting edge of the punching press of pipe end circular arc cutaway under the depressed part.

4. as pipe end circular arc cutaway blanking apparatus as described in the claim 3, it is characterized in that described two guiding connect projections, punching press support portion and gathering sill and are connected; Gathering sill cross sectional shape in the horizontal direction is " T " font.

5. pipe end circular arc cutaway blanking apparatus according to claim 1 is characterized in that offering on the described fixed head die hole, and die is located in the die hole, is connected by screw or bolt between die and the base.

6. as pipe end circular arc cutaway blanking apparatus as described in claim 1 or 5, it is characterized in that described die end face offers the arc groove of pipe end circular arc cutaway stamping-out, crossing of groove and die end face is the stamped female cutting edge.

7. as pipe end circular arc cutaway blanking apparatus as described in the claim 6, it is characterized in that described die end face is provided with the deep-slotted chip breaker that supports pipe, crossing of deep-slotted chip breaker and groove is the stamped female cutting edge.

8. as pipe end circular arc cutaway blanking apparatus as described in the claim 3, it is characterized in that described punching press support portion is provided with vertical step.

9. as pipe end circular arc cutaway blanking apparatus as described in the claim 3, the gap that it is characterized in that the protruding cutting edge vertical direction of stamped female cutting edge and punching press is 1.2 ~ 1.5 times the pipe thickness that is punched pipe.

10. as pipe end circular arc cutaway blanking apparatus as described in the claim 6, the gap that it is characterized in that the protruding cutting edge vertical direction of stamped female cutting edge and punching press is 1.2 ~ 1.5 times the pipe thickness that is punched pipe.

11. as pipe end circular arc cutaway blanking apparatus as described in the claim 7, the gap that it is characterized in that the protruding cutting edge vertical direction of stamped female cutting edge and punching press is 1.2 ~ 1.5 times the pipe thickness that is punched pipe.

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