CN114309103A - Self-centering cold-drawing die base - Google Patents

Abstract

The invention discloses a self-centering cold drawing die seat which is structurally characterized in that a head plate of a drawing machine is connected with an inner spherical die seat through bolts, a spherical hole formed in the central position of the inner spherical die seat is internally provided with an outer spherical floating die seat, a conical hole formed in the central position of the outer spherical floating die seat is internally provided with a conical die seat, a hard alloy cold drawing die is embedded in the hole formed in the central position of the conical die seat in an interference manner, die baffles are arranged on the ports of the inner spherical die seat, the outer spherical floating die seat and the conical die seat, and six threaded connecting holes are formed in the outer circle end surface of each die baffle at intervals and are fixedly connected with connecting holes formed in the inner spherical die seat through fixing bolts. The invention has the beneficial effects that: rational in infrastructure, simple to operate is swift, and simple to use can automatic floating centering, draws the precision height, draws the material specification requirement according to needs, and quick replacement toper mould seat is traded promptly and is used, need not the timing, and labour saving and time saving is particularly useful for middle-size and small-size drawbench and draws steel production.

Description

Self-centering cold-drawing die base

Technical Field

The invention belongs to the field of steel cold-drawing forming dies, and particularly relates to a self-centering cold-drawing die seat.

Background

Cold drawing is a processing technique for forming metal pipes and bars, which not only makes the metal material reach a certain section shape required by people, but also improves the mechanical property of the material, so that a mould is a key factor for determining the quality of the cold-drawn pipes or bars.

At present, in the machining industry of machine manufacturing and spare and accessory parts, the realization of less cutting and no cutting are the development directions of machining and manufacturing, and are also important contents of energy-saving and emission-reducing green machining, if an advanced metal cold-drawing die is provided, the non-cutting and less-cutting machining of mechanical parts can be realized, if the size and the surface precision of round steel after being drawn can reach 7 grades, the die can be directly applied to the machining and manufacturing of various shaft parts.

The existing cold-drawing machine die structure is formed by embedding a hard alloy cold-drawing die in a conical die seat, then carrying out manual coarse grinding, fine grinding and polishing, and because the coaxiality of an alloy central hole line and an outer conical surface central line of the conical die is difficult to ensure in the manual machining and manufacturing process, the cold-drawing die needs to be manually and repeatedly debugged in the cold-drawing steel production process, more importantly, the straightness of the produced product does not reach the standard, great difficulty is brought to subsequent gold machining, more waste materials are cut, the waste of raw materials is great, and the control of the production cost is not facilitated.

Disclosure of Invention

The invention aims to overcome the defects and provide the self-centering cold-drawing die seat, and the cold-drawing die adopting the structure is always in a floating state, so that the die is always kept at the position of a central line, and the straightness of cold-drawn round steel can be ensured.

In order to realize the aim, the invention adopts the technical scheme that the self-centering cold-drawing die seat comprises a drawing machine head plate, an inner spherical die seat, an outer spherical floating die seat, a conical die seat, a hard alloy cold-drawing die and a die baffle, the head plate of the drawing machine tool is connected with the inner spherical die holder through a first fixing bolt, a spherical hole arranged at the central position of the inner spherical die holder is internally provided with an outer spherical floating die holder, a conical die seat is arranged in a conical hole formed in the central position of the outer spherical surface floating die seat, a hard alloy cold drawing die is embedded in the hole formed in the central position of the conical die seat in an interference manner, the ports of the inner spherical surface die holder, the outer spherical surface floating die holder and the conical die holder are provided with die baffles, and the holes formed in the mould baffle are fixedly connected with the connecting holes formed in the port surface of the inner spherical mould base through second fixing bolts.

Furthermore, at least three adjusting screws and two first fixing bolts are arranged in holes formed in the port of the inner spherical die holder at intervals, the three adjusting screws are used for pre-adjusting the inner spherical die holder, the two first fixing bolts are used for fixedly connecting a head plate of a cold-drawing machine tool, and a backstop gasket is further arranged on each first fixing bolt to prevent the first fixing bolts from loosening to cause displacement of the inner spherical die holder.

Further, six threaded connection holes are formed in the outer circle end face of the die baffle at intervals, eight stepped floating holes are formed in the inner circle end face at intervals, the die baffle is fixedly connected with concentric threaded holes formed in the port of the inner spherical die holder through six second fixing bolts in the six threaded connection holes, and the eight stepped floating holes are used for floating and positioning the outer spherical floating die holder through eight floating pins.

Furthermore, floating springs, flat gaskets and split pins are respectively arranged on the eight floating pins, so that the centers of the outer spherical surface floating die holder and the hard alloy cold drawing die are ensured to float along with the center of the drawing machine.

Furthermore, a cotter pin is arranged in a through hole formed in the side face of the upper portion of the floating pin.

The invention has the beneficial effects that: firstly, the inner spherical die holder is provided with an adjusting screw to facilitate the pre-adjustment of the initial die position, the die is fastened and connected by a first fixing bolt after the die position is adjusted, and the first fixing bolt is provided with a backstop gasket to effectively prevent the inner spherical die holder from moving due to the looseness of the first fixing bolt; secondly, as the outer spherical surface floating die holder is arranged in the inner spherical surface die holder to form a floating self-centering spherical surface structure, the outer conical surface of the conical die holder is matched with the inner conical hole of the outer spherical surface floating die holder, the central line of the hard alloy drawing die changes in a floating way along with the change of the center of the traction pliers vehicle, the center of the die, the center of the jaw and the central line of a workpiece are always ensured to be consistent, and thus the straightness of the cold-drawn round steel is ensured; thirdly, the installation quality of the cold-drawing die is improved, the adjusting time is reduced, bad products generated in the adjusting process are avoided, and the economic benefit of enterprises is improved; fourthly, the outer spherical surface floating die holder is arranged in the inner spherical surface die holder, and the cold-drawing die baffle is arranged on the inner spherical surface die holder through the floating pin and the floating spring, so that the axial centers of the outer spherical surface floating die holder and the hard alloy cold-drawing die are ensured to float along with the center of the drawing machine, and the production quality of the cold-drawn round steel product is improved; fifthly, when materials with different specifications need to be cold-drawn, the conical die base is only needed to be replaced, the production can be realized, the adjustment is not needed, the time and the labor are saved, and the popularization and the use are convenient.

Drawings

FIG. 1 is a front sectional view of the present invention;

FIG. 2 is a top view of the present invention;

fig. 3 is a partially enlarged sectional view of a in fig. 1.

Reference numbers in the drawings: 1-drawing machine head plate, 2-internal spherical die holder, 3-backstop gasket, 4-first fixing bolt, 5-die baffle, 6-second fixing bolt, 7-floating spring, 8-floating pin, 9-split pin, 10-flat gasket, 11-hard alloy drawing die, 12-conical die holder, 13-external spherical floating die holder and 14-adjusting screw.

Detailed Description

In order to facilitate understanding of those skilled in the art, the embodiments of the present invention will be further described with reference to the accompanying drawings.

The self-centering cold-drawing die seat shown in the figure 1-2 comprises a drawing machine head plate 1, an inner spherical surface die seat 2, an outer spherical surface floating die seat 13 and a conical die seat 12, hard alloy cold drawing die 11, mould baffle 5, be connected with interior sphere die holder 2 through first fixing bolt 4 on drawing machine head board 1, the spherical hole that interior sphere die holder 2 central point put and be equipped with embeds has the unsteady die holder 13 of ectosphere, the bell mouth that 13 central point of ectosphere float die holder put and be equipped with toper mould seat 12, carbide cold drawing die 11 is being inlayed to downthehole interference that toper mould seat 12 central point put and be equipped with, interior sphere die holder 2, the unsteady die holder 13 of ectosphere, be equipped with mould baffle 5 on the 12 ports of toper mould seat, the downthehole connecting hole fastening connection that is equipped with on through second fixing bolt 6 and the 2 port faces of interior sphere die holder of mould baffle 5.

In a preferred embodiment, at least three adjusting screws 14 and two first fixing bolts 4 are disposed in holes formed in the port of the inner spherical die holder 2 at intervals, wherein the three adjusting screws 14 are used for pre-adjusting the inner spherical die holder 2, the two first fixing bolts 4 are used for fixedly connecting the head plate 1 of the cold-drawing machine tool, and a retaining gasket 3 is further disposed on the first fixing bolts 4 to prevent the inner spherical die holder 2 from being displaced after the first fixing bolts 4 are loosened.

In the preferred embodiment, six threaded connection holes are formed in the outer circle end face of the mold baffle 5 at intervals, eight stepped floating holes are formed in the inner circle end face at intervals, the mold baffle 5 and the concentric threaded holes formed in the ports of the inner spherical mold base 2 are fixedly connected in the six threaded connection holes through six second fixing bolts 6, and the eight stepped floating holes are used for floating and positioning the outer spherical floating mold base 13 through eight floating pins 8.

In a preferred embodiment, the eight floating pins 8 are respectively provided with a floating spring 7, a flat gasket 10 and a split pin 9, so that the centers of the outer spherical surface floating die holder 13 and the hard alloy cold drawing die are ensured to float along with the center of the drawing machine.

In a preferred embodiment, a cotter pin 9 is inserted into a through hole formed in the upper side surface of the floating pin 8.

When the special spherical floating self-centering die holder is used, the special spherical floating self-centering die holder for the cold drawing machine is arranged in a hole of a head plate of the cold drawing machine, the verticality between the end surface of the special spherical floating self-centering die holder for the cold drawing machine and a guide rail of the cold drawing machine is checked, if deviation does not meet the requirement, the initial position is adjusted by using three adjusting screws, two first fixing bolts are required to be loosened properly during adjustment, the two first fixing bolts are repeatedly adjusted and checked until the requirements are met, and finally the head plate of the drawing machine and the inner spherical die holder are fastened and connected by using the two first fixing bolts. Corresponding conical die seats are selected for use according to the specification of drawing the round steel in the production process, so that the production can be realized, debugging is not needed, the cold die can be quickly replaced, the time is saved, and the working efficiency is improved.

The feeding machine of the drawing machine tool sends a traction section of round steel to be drawn into a hard alloy drawing die in production, the jaw of the drawing machine traction tongs car grabs the traction section of the round steel to carry out drawing production, and the straightness of the cold-drawn steel is changed due to the influence of the manufacturing precision of a cold drawing machine and other factors in the drawing process.

The invention has the advantages of reasonable structure, convenient and fast installation, simple use, automatic floating centering and high drawing precision, can be used immediately by only replacing the conical die seat according to the specification requirement of the required drawing material without adjustment, saves time and trouble, and is particularly suitable for the production of drawing steel by small and medium-sized cold drawing machines.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should, without departing from the spirit of the present invention, devise similar structural modes and embodiments without inventively designing them, and shall fall within the scope of the present invention.

Claims (5)

1. A self-centering cold-drawing die seat comprises a drawing machine head plate (1), an inner spherical die seat (2), an outer spherical floating die seat (13), a conical die seat (12), a hard alloy cold-drawing die (11) and a die baffle (5), and is characterized in that the drawing machine head plate (1) is connected with the inner spherical die seat (2) through a first fixing bolt (4), the spherical hole formed in the central position of the inner spherical die seat (2) is internally provided with the outer spherical floating die seat (13), the conical hole formed in the central position of the outer spherical floating die seat (13) is internally provided with the conical die seat (12), the hard alloy cold-drawing die (11) is embedded in the hole formed in the central position of the conical die seat (12) in an interference manner, and the die baffle (5) is arranged on the ports of the inner spherical die seat (2), the outer spherical floating die seat (13) and the conical die seat (12), and the holes formed in the mold baffle (5) are fixedly connected with the connecting holes formed in the port surface of the inner spherical mold base (2) through second fixing bolts (6).

2. The self-centering cold-drawing die holder according to claim 1, wherein at least three adjusting screws (14) and two first fixing bolts (4) are arranged in holes arranged at intervals on the port of the inner spherical die holder (2), wherein the three adjusting screws (14) are used for pre-adjusting the inner spherical die holder (2), the two first fixing bolts (4) are used for fixedly connecting the head plate (1) of the cold-drawing die, and a backing-up prevention gasket (3) is further arranged on the first fixing bolts (4) to prevent the first fixing bolts (4) from moving to cause the displacement of the inner spherical die holder (2).

3. The self-centering cold-drawing die holder according to claim 1, wherein six threaded connection holes are formed in the outer circle end face of the die baffle plate (5) at intervals, eight stepped floating holes are formed in the inner circle end face at intervals, the six threaded connection holes are internally and fixedly connected with concentric threaded holes formed in the port of the inner spherical die holder (2) through six second fixing bolts (6), and the eight stepped floating holes are internally and respectively used for floating and positioning the outer spherical floating die holder (13) through eight floating pins (8).

4. A self-centering cold-drawing die holder according to claim 3, wherein the eight floating pins (8) are respectively provided with a floating spring (7), a flat gasket (10) and a split pin (9), so as to ensure that the centers of the outer spherical surface floating die holder (13) and the hard alloy cold-drawing die float along with the center of the drawing machine.

5. A self-centring cold-drawing die holder according to claim 4, characterised in that the floating pin (8) has a cotter pin (9) built into a through hole provided in the upper side.

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