CN114799954B - Five-axis quick-change fixture for large cold stamping automotive die inserts - Google Patents

Abstract

A five-axis machine quick-change clamp for machining a large-scale cold stamping automobile die insert mainly comprises a base connected with a five-axis machine tool, wherein a locking mechanism is in threaded connection with the base, and a quick-change plate is quickly assembled and separated from the locking mechanism through a positioning locking nail in threaded connection with the quick-change plate; by the aid of the structure, accurate positioning between the insert and the clamp can be achieved, quick replacement between the clamp and a five-axis machine can be achieved, machining precision and machining efficiency are improved, and machining cost is reduced.

Description

Five-axis quick-change fixture for large cold stamping automotive die inserts

technical field

The invention belongs to the technical field of clamps, and in particular relates to a five-axis machine quick-change clamp used for processing large-scale cold stamping automobile mold inserts.

Background technique

The functional inserts inside the large automobile cold stamping die belong to the non-standard discrete processing method, that is, each block has different attributes, and the shape, size, screw hole position, hole diameter, precision and processing elements are different. For such functional inserts, not only have high precision requirements, large quantity, short processing time, but also large size and complex shape, making it difficult to process, and there is a problem of repeated workpiece clamping and positioning. Therefore, the clamping and positioning before the five-axis machining is particularly difficult, time-consuming and labor-intensive, and the phenomenon of fixture processing interference is prone to occur.

The existing clamps on the market are not very matched, they are all jaw clamping type, which is not easy to locate, especially for inserts with special-shaped contours, high stability and high precision clamping cannot be achieved. All online clamping is time-consuming and labor-intensive. Therefore, the clamp has many restrictive types, which will lead to the phenomenon that the machining utilization rate of the five-axis is too low and the machining cost will increase.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a five-axis machine quick-change fixture for large-scale cold stamping automobile mold insert processing, which can achieve precise positioning between the insert and the fixture on the one hand, and realize the fixture and the five-axis machine on the other hand. The quick replacement between them can improve the processing accuracy and processing efficiency, and reduce the processing cost.

The technical scheme of the present invention is:

A five-axis machine quick-change fixture used for processing large-scale cold stamping automobile mold inserts, comprising a base for connecting with a five-axis machine tool, a locking mechanism is threadedly connected to the base, and a quick-change plate is threadedly connected with the positioning lock Fast assembly and separation of the nail and locking mechanism;

The locking mechanism includes a clamp base body, an accommodating groove is opened at the upper end of the clamp base body, and a locking slider group is installed in the accommodation groove; the clamp base cover is bolted to the clamp base body and locks the The tight slider group is limited in the accommodating groove;

The locking slider group includes a locking member, a first transmission member and a second transmission member; one end of the locking member and the second transmission member has a V-shaped convex surface, and the other end has an inclined surface; the first One end of a transmission member has a flat surface, and the other end has a V-shaped convex surface;

The V-shaped convex surfaces of the first transmission part are matched with the inclined surfaces of the two second transmission parts, and the V-shaped convex surfaces of the two second transmission parts are respectively matched with the inclined surfaces of the two locking parts; the The plane of the first transmission part is matched with the jack screw, and the jack screw is threadedly connected in the clamping seat body;

The positioning locking nail is provided with a clamping groove corresponding to the V-shaped convex surface of the locking piece.

Further, a reset mechanism is also provided on the locking slider group.

Further, the reset mechanism includes a spring and a spring positioning pin, and two ends of the spring are respectively arranged on the same side in the two locking members and fixed by the spring positioning pin.

Further, the quick-change plate is a plate with a plurality of waist-shaped grooves, and a sliding block is arranged in the groove, and the sliding block is provided with a threaded hole or a board with a matrix of threaded holes.

The present invention that adopts above-mentioned technical scheme can bring following beneficial effect:

Through the structure provided by the present invention, on the one hand, precise positioning between the insert and the fixture can be achieved;

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

Figure 2 is an exploded view of the present invention.

FIG. 3 is an exploded schematic view of the locking slider set of the present invention.

FIG. 4 is a schematic diagram of the connection between the quick-change clamp of the present invention and the functional insert.

In the figure, 1-base, 2-locking mechanism, 3-quick change plate, 4-positioning locking pin, 5-top screw, 21-clamp body, 22-lock slide group, 23-clamp cover plate, 211-accommodating groove, 221-locking piece, 222-first transmission piece, 223-second transmission piece.

Detailed ways

As shown in Figure 1-3, a five-axis machine quick-change fixture for processing large-scale cold stamping automobile mold inserts is characterized in that: it includes a base 1 for connecting with a five-axis machine tool, and the base 1 is threadedly connected with The locking mechanism 2 and the quick-change plate 3 are quickly assembled and separated from the locking mechanism 2 through the positioning locking nails 4 threadedly connected thereto.

Among them, the quick-change plate 3 is made of 40Cr material for quenching and tempering treatment, and its structure can take various forms: for example, the quick-change plate 3 can be provided with a plurality of waist-shaped grooves, and the waist-shaped grooves are provided with sliders and slides. A plate with threaded holes on the block, the slider is set in the slideway of the waist groove, the die insert is threadedly connected with the slider, and the die insert is firmly set on the quick-change plate 3 by the tightening force of the bolt.

In addition, the quick-change plate 3 can also be provided with matrix threaded holes, and the die inserts can be connected with different threaded holes, and the position of the die inserts on the quick-change plate 3 can also be adjusted and accurately positioned; in addition to the aforementioned methods, The quick-change plate 3 can also be a suction cup, which can attract the mold inserts by magnetic force.

The locking mechanism 2 includes a clamping base body 21, the upper end of the clamping base body 21 is provided with an accommodating groove 211, the accommodating groove is an I-shaped structure, and a locking slider group 22 is installed therein; The seat cover plate 23 is bolted to the clamping seat body 21 and defines the locking slider group 22 in the accommodating groove 211; wherein, the locking slider group 22 includes a locking member 221, a first transmission member 222 and a first transmission member 222. Two transmission members 223; one end of the locking member 221 and the second transmission member 223 has a V-shaped convex surface, and the other end has an inclined surface; one end of the first transmission member 222 has a flat surface, and the other end has a V-shaped convex surface noodle.

The V-shaped convex surface of the first transmission member 222 is matched with the inclined surfaces of the two second transmission members 223, the inclined surfaces of the two second transmission members 223 form a V-shaped depression, and the V-shaped convex surface of the first transmission member 222 is formed. The V-shaped convex surface of the second transmission member 223 is matched with the inclined surfaces of the two locking members 221 respectively; the inclined surfaces of the two locking members 221 form a V-shaped depression, the second The V-shaped convex surface of the transmission member 223 is embedded in the V-shaped depression; the plane of the first transmission member 222 is matched with the top wire 5, and the top wire 5 is threadedly connected in the holder body 21; when the top wire 5 is screwed in When the V-shaped convex surface of the first transmission member 222 is displaced, it pushes the two second transmission members 223 to move in the opposite direction, and the two second transmission members 223 respectively push the two locking members 221 matched with them to be opposite to each other. Since the positioning locking nail 4 is provided with a slot corresponding to the V-shaped convex surface of the locking member 221, when the positioning locking nail 4 passes through the positioning locking pin hole on the clamping seat cover 23 When placed in the accommodating slot 211, the V-shaped convex surface of the locking member 221 will be locked with the card slot, so as to achieve the quick fixation between the quick-change plate 3 and the locking mechanism 2; in principle, the quick-change plate 3 The separation from the locking mechanism 2 only needs to unscrew the top wire 5 and shake the quick-change plate 3. However, in order to better realize the separation process, a reset mechanism needs to be set on the locking slider group 22. The mechanism includes a spring and a spring positioning pin, and the two ends of the spring are respectively arranged on the same side in two locking pieces and fixed by the spring positioning pins; when the top wire 5 is screwed in, the spring is in a stretched state; When the 5 is unscrewed, under the action of the pulling force, the locking slider group 22 returns to its original position; it should be noted that the stroke of the top screw 5 should not be too large. For the limit, the small stroke can make the operation more convenient.

The number of positioning and locking pin holes provided on the cover plate 23 of the clamp seat is four, and the four holes are distinguished and divided into two groups: positioning hole group and auxiliary hole group. The difference between the two groups is 10mm. Anti-reaction. The positioning hole group plays the role of positioning and locking; the auxiliary hole group plays the role of auxiliary clamping. This can play the role of quick positioning and clamping, and can also ensure that the quick-change plate is not installed backwards.

Fig. 4 shows a schematic diagram of the connection relationship between the insert and the quick-change clamp. It can be seen from the figure that since the quick-change plate 3 is provided with a plurality of waist-shaped grooves, a slider with threaded holes is arranged in the waist-shaped groove, By adjusting the position of the slider, functional inserts of different specifications can be locked onto the quick-change plate 3 to realize positive locking, reverse locking and clamping locking. In addition, when replacing the workpiece, it is only necessary to loosen the top screw 5 and replace the quick-change plate 3 components that have already installed the inserts offline; it should be noted that the machining reference, that is, the workpiece coordinate system, is set at the hole center of the auxiliary hole group And on the upper surface, there is no need to change it in the future, so that the workpiece can be quickly changed with high precision, and the workpiece coordinate system does not need to be redesigned every time the workpiece is replaced.

The above is only the preferred embodiment of the invention, not a limitation of the present invention. Any equivalent replacement and modification made by those skilled in the art without departing from the guidance of the present invention are deemed to fall within the scope of the present invention. the scope of protection of the invention.

Claims (4)

1. The utility model provides a five quick change anchor clamps of quick-witted for processing of large-scale cold stamping automobile die insert which characterized in that: the quick-change plate assembly machine comprises a base (1) connected with a five-axis machine tool, wherein a locking mechanism (2) is in threaded connection with the base (1), and the quick-change plate (3) is quickly assembled and separated from the locking mechanism (2) through a positioning locking nail (4) in threaded connection with the quick-change plate;

the locking mechanism (2) comprises a holder body (21), the upper end of the holder body (21) is provided with a containing groove (211), and a locking slide bar group (22) is arranged in the containing groove; the clamping seat cover plate (23) is connected with the clamping seat body (21) through bolts and limits the locking slide bar group (22) in the containing groove (211);

the locking sliding strip group (22) comprises a locking piece (221), a first transmission piece (222) and a second transmission piece (223); one end of each locking piece (221) and one end of each second transmission piece (223) are provided with V-shaped convex surfaces, and the other ends of the locking pieces and the second transmission pieces are provided with inclined surfaces; one end of the first transmission piece (222) is provided with a plane, and the other end of the first transmission piece is provided with a V-shaped convex surface;

the V-shaped convex surface of the first transmission piece (222) is matched with the inclined surfaces of the two second transmission pieces (223), and the V-shaped convex surface of each second transmission piece (223) in the two second transmission pieces (223) is respectively matched with the inclined surfaces of the two locking pieces (221); the plane of the first transmission piece (222) is matched with the jackscrew (5), and the jackscrew (5) is in threaded connection with the inside of the holder body (21);

the inclined surfaces of the two locking pieces (221) form a V-shaped recess, and the V-shaped convex surface of the second transmission piece (223) is embedded in the V-shaped recess;

and a clamping groove corresponding to the V-shaped convex surface of the locking part (221) is formed in the positioning locking nail (4).

2. The five-axis machine quick-change clamp for machining the insert of the large-sized cold stamping automobile die according to claim 1, which is characterized in that: and the locking sliding strip group (22) is also provided with a resetting mechanism.

3. The five-axis machine quick-change clamp for machining the insert of the large-sized cold stamping automobile die according to claim 2, wherein the five-axis machine quick-change clamp comprises: the reset mechanism comprises a spring and a spring positioning pin, wherein two ends of the spring are respectively arranged on two locking pieces (221) forming a V-shaped recess and are fixed through the spring positioning pin.

4. The five-axis machine quick-change clamp for machining the insert of the large-sized cold stamping automobile die according to claim 1, which is characterized in that: the quick-change plate (3) is provided with a plurality of waist-shaped grooves, sliding blocks are arranged in the waist-shaped grooves, plates with threaded holes are arranged on the sliding blocks, or the quick-change plate (3) is a plate with matrix threaded holes.

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