CN112170676A - Clamping device for hot straightening of round bar - Google Patents

Abstract

The clamping device for hot straightening of round bars belongs to the technical field of technological equipment, and is characterized in that the clamping device utilizes the functions of two guide chutes with included angles of beta on a base and a cover plate and raised guide rails on left and right sliding blocks to ensure that the left and right sliding blocks can slide back and forth along the guide chutes, the left and right sliding blocks bite the round bars through sawteeth, an axial forward sliding trend is generated when the round bars are pulled, the left and right sliding blocks simultaneously bear the pulling force and generate forward sliding and middle contraction force, the clamping force of the left and right sliding blocks is increased, the clamping of the bars is always in a reliable and stable state, the problem that the bars are thinned and elastically deformed after slipping from the clamping device in the straightening process to cause safety threats to field workers is avoided, the clamping device is simple in structure and easy to manufacture, and the number of components is small.

Description

Clamping device for hot straightening of round bar

Technical Field

The invention belongs to the technical field of technological equipment, and particularly relates to a clamping device for hot straightening of a round bar.

Background

During the processing of the hot-rolled round titanium bar, the coiled material needs to be straightened, for example, a hot-rolled titanium (TC4) bar with the diameter of phi 15mm needs to be straightened into a straight material with the length of about 2 meters. The straightening method used at present comprises the steps of clamping two ends of a round titanium bar, applying axial tension, heating and softening the titanium bar with the diameter of 15mm, straightening the bar heated and softened under the action of certain axial tension, stopping heating the bar, naturally cooling and shaping, and taking down the straightened bar.

The existing bar straightening and clamping device applies radial clamping force to a bar by a screw mechanism to clamp the bar. When this screw mechanism for clamping device applys radial force, complex operation, inefficiency, radial clamp force is invariable when the bar is flare-outed, and along with the attenuation of flare-outing of bar, it is not hard up the slippage from clamping device to make the bar easily, and elastic deformation behind the bar slippage causes the threat to site work personnel's safety.

In order to solve the problems of complicated operation, low efficiency and potential safety hazard in production, improvement is needed.

Disclosure of Invention

The technical problems solved by the invention are as follows: the invention provides a clamping device for hot straightening of a round bar, which utilizes the functions of guide chutes with the same included angle on a base and a cover plate and raised guide rails on left and right sliding blocks to generate an axial forward sliding trend when the round bar is pulled, so that the left and right sliding blocks simultaneously bear the pulling force and generate forward sliding and middle contraction force, the clamping force of the left and right sliding blocks is increased, the clamping of the bar is always in a reliable and stable state, and the problem that the bar becomes thin in the straightening process, becomes loose and slides off from the clamping device and then elastically deforms to cause safety threat to field workers is avoided.

The technical scheme adopted by the invention is as follows: the clamping device comprises a base, a left sliding block, a right sliding block, a cover plate, a pull rod, a hook and a spring, wherein the cover plate is fixedly connected to the upper portion of the base; the center part of the parting surface of the left sliding block and the right sliding block is provided with a parting round hole which is matched with the round bar and clamps the round bar; the rear parts of the left and right sliding blocks are provided with hooks, the front ends of the hooks are hinged with the rear ends of the left and right sliding blocks, the rear ends of the hooks are hinged with the lower parts of the pull rods, the lower ends of the pull rods are supported on the base bottom plate, the upper parts of the pull rods extend out of the cover plate, and the two sides of the rear ends of the left and right sliding blocks are abutted tightly through springs arranged on the base rear plate.

In order to further limit the technical scheme, arc saw teeth are densely distributed on the inner surface of the fractal circular hole in the circumferential direction.

The technical scheme is further limited, the front end of the hook is hinged with the rear ends of the left and right sliding blocks through a shaft I, the rear ends of the left and right sliding blocks are transversely provided with concentric round holes matched with the shaft I, and the front end of the hook is provided with a U-shaped hanging groove matched and hung with the shaft I; the rear end of the hook is hinged to the lower portion of the pull rod through a shaft II, and the rear end of the hook is provided with a transverse round hole matched with the shaft II and a longitudinal U-shaped groove matched with the pull rod.

In order to further limit the technical scheme, a pull rod fulcrum square hole which is used as a pull rod fulcrum is arranged on the base bottom plate, and a pull rod passing square hole which is convenient for the pull rod to extend out is arranged on the cover plate.

The technical scheme is further limited, the front end of the spring is abutted against the rear end faces of the left sliding block and the right sliding block, the rear end of the spring is connected with the base rear plate through the guide post, the guide post is fixed on the base rear plate, the base rear plate is provided with a mounting round hole for fixing the guide post, and the rear end of the spring is sleeved on the guide post.

The technical scheme is further limited, the external dimension of the cover plate is matched with the external dimension of the upper part of the base, and the cover plate is fixed at the correct position of the base through the pin and then fastened with the base through the screw.

Compared with the prior art, the invention has the advantages that:

1. the clamping device of this scheme utilizes the effect of the protruding guide rail on the same direction spout of two respectively contained angles on base and the apron and the left and right sides slider, the slider can slide around along the direction spout about guaranteeing, it bites tightly circular bar through the sawtooth to control the slider, produce the forward slip trend of axial when circular bar receives the pulling force, the slider also bears the pulling force simultaneously and produces preceding smooth and to the strength of middle shrink about the messenger, control the increase of slider clamping-force, it is in reliable stable state all the time to step up of bar, avoided the bar to become flexible deformation after the slippage from clamping device in the straightening process and cause the problem of security threat to the field work personnel, moreover, the steam generator is simple in structure, easy manufacture, the component is small in quantity.

2. Clamping device utilizes the spring action to realize the function of swiftly pressing from both sides tight circular bar for the thrust of controlling the slider in this scheme, makes the tight operation of clamp convenient and fast more, improves work efficiency.

3. Circular arc saw teeth are densely distributed in the circumferential direction of the inner surface of the fractal circular hole of the left sliding block and the right sliding block in the scheme, so that the clamping friction force between the circular rod and the rod can be increased, the clamping reliability of the circular rod is ensured, and the circular rod is not easy to slip.

Drawings

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

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

FIG. 3 is a front view of the base structure of the present invention;

FIG. 4 is a left side view of the structure of the base of the present invention;

FIG. 5 is a front view of the structure of the left and right sliders in the present invention;

FIG. 6 is a left side view of the structure of the left and right sliders according to the present invention;

FIG. 7 is a top view of the structure of the left and right sliders according to the present invention;

FIG. 8 is a front view of the cover plate according to the present invention;

FIG. 9 is a left side view of the structure of the cover plate of the present invention;

FIG. 10 is a front view of the hook construction of the present invention;

FIG. 11 is a top view of the hook construction of the present invention;

fig. 12 is a schematic structural diagram of a use state of the straightening device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements" does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Referring to fig. 1-12, embodiments of the present invention are described in detail.

A clamping device for hot straightening of a round bar stock is shown in figures 1 and 2 and comprises a base 1, a left slide block 2, a right slide block 2, a cover plate 3, a pull rod 6, a hook 7 and a spring 11.

The flange of the base 1 is provided with screw holes for mounting the clamping device. The upper portion of the base 1 is fixedly connected with a cover plate 3, the overall dimension of the cover plate 3 is matched with that of the upper portion of the base 1, and the cover plate 3 is fastened with the base 1 through a screw 4 after determining a correct position through a pin 9 and the base 1.

A left sliding block and a right sliding block 2 are arranged in the base 1, as shown in fig. 5-7, the left sliding block and the right sliding block 2 are in a conical structure with the taper of beta, and the upper edge and the lower edge of the conical surfaces at the two sides of the left sliding block and the right sliding block 2 are respectively provided with a convex guide rail 201 with the included angle of beta; as shown in fig. 3 and 4, the included angle of the inner walls of the two sides of the front part of the inner cavity of the base 1 is beta, and a lower guide chute 101 which is matched with the convex guide rail 201 on the lower edge of the left and right slide blocks 2 in a sliding manner is arranged on the inner walls; as shown in fig. 8 and 9, an upper guide chute 301 having an included angle β and slidably fitting with the raised guide rail 201 on the upper edge of the left and right sliders 2 is disposed on the front portion of the inner surface of the cover plate 3. The center part of the parting surface of the left and right slide blocks 2 is provided with a parting round hole 202 which is matched with the round bar and clamps the round bar. Preferably, the circular arc saw teeth 203 are densely distributed on the inner surface of the fractal circular hole 202 in the circumferential direction, so that the clamping friction force between the fractal circular hole and a bar can be increased, and the circular bar is ensured to be reliably clamped and not easy to slip.

It is equipped with couple 7 to control 2 rear portions of slider, couple 7 front ends with about 2 rear ends of slider are articulated through I5 of axle, about 2 rear ends of slider transversely be equipped with the concentric round hole 204 of I5 adaptation of axle, 7 front ends of couple are equipped with the U type string groove 701 of closing with I5 adaptation of axle. The rear end of the hook 7 is hinged with the lower part of the pull rod 6 through a shaft II 8, as shown in fig. 10 and 11, the rear end of the hook 7 is provided with a transverse round hole 702 matched with the shaft II 8 and a longitudinal U-shaped groove 703 matched with the pull rod 6. The lower end of the pull rod 6 is supported on a base plate of the base 1, the upper portion of the pull rod 6 extends out of the cover plate 3, a pull rod fulcrum square hole 102 serving as a fulcrum of the pull rod 6 is formed in the base plate of the base 1, and a pull rod passing square hole 302 facilitating extension of the pull rod 6 is formed in the cover plate 3. The pull rod 6 is pulled upwards and backwards to drive the hook 7, so that the left and right slide blocks 2 slide backwards along the two guide slide grooves with the included angle beta and are separated leftwards and rightwards, and the round bar stock is loosened.

The left and right sides of the rear part of the left and right slide blocks 2 are connected with the rear plate of the base 1 through springs 11. The front end of the spring 11 is tightly propped against the rear end faces of the left and right sliding blocks 2, and always applies thrust to the left and right sliding blocks 2, so that the left and right sliding blocks 2 slide forwards along two guide sliding grooves with included angles beta to shrink and clamp the round titanium bar. The rear end of the spring 11 is connected with the rear plate of the base 1 through the guide post 10, the guide post 10 is fixed on the rear plate of the base 1, the rear plate of the base 1 is provided with an installation round hole 103 for fixing the guide post 10, and the rear end of the spring 11 is sleeved on the guide post 10.

The working principle is as follows: as shown in FIG. 12, two sets of the clamping devices are respectively arranged at the left end and the right end of the worktable of the bar hot straightening equipment. The left end clamping device is fixed, and the right end clamping device can move left and right along with a carriage on the equipment workbench.

The pull rod 6 on the clamping device at the left end is pulled upwards and backwards, the pull rod 6 drives the hook 7 to pull the left and right sliding blocks 2, so that the left and right sliding blocks 2 slide towards the rear of the clamping device along two guide sliding grooves with included angles beta, and meanwhile, the left and right sliding blocks 2 are separated towards two sides by taking the parting surface as the center. At this time, the spring 11 is compressed and accumulates a larger pressure. One end of a hot-rolled titanium bar material with phi 15mm is placed into a fractal circular hole 202 in the middle of the fractal surface of the left and right slide blocks 2, the pull rod 6 is loosened, the left and right slide blocks 2 slide forwards along two guide sliding grooves with an included angle beta under the pressure action of the spring 11 and contract towards the center to clamp the titanium bar with phi 15mm, and the circular arc saw teeth 203 densely distributed in the fractal circular hole 202 in the middle of the left and right slide blocks 2 bite the titanium bar with phi 15mm under the action of the contraction force of the slide blocks.

The clamping device at the right end of the workbench of the bar hot straightening equipment is operated in the same way, and the other end of the titanium bar with the diameter of 15mm is placed into the fractal circular hole 202 in the middle of the fractal surface of the left and right slide blocks 2 to be clamped.

Starting the hot straightening equipment, the clamping device at the right end receives rightward tension, the left and right sliding blocks 2 clamping the titanium rod transmit the tension to the titanium rod, and after the left and right sliding blocks 2 gripping the titanium rod by the circular arc saw teeth 203 receive the tension, the forward movement and the force shrinking to the center are increased, so that the titanium rod is clamped more firmly. Starting the equipment heating system, heating the titanium rod, rapidly raising the temperature, heating the titanium rod, softening the titanium rod material, gradually straightening the titanium rod material under the action of tension, closing the equipment heating system, and naturally cooling the titanium rod material under the condition of tension. Heating the titanium bar stock to soften, straightening under stress, cooling and shaping.

And closing the hot straightening equipment, and removing the tension force borne by the clamping device at the right end. Pulling the pull rod 6, moving the left and right slide blocks 2 to the rear of the clamping device, simultaneously separating the two sides along the two guide sliding grooves, loosening the titanium bar, and taking out the titanium bar from the central holes of the left and right slide blocks 2. And taking out the other end of the titanium bar material in the same way to finish the hot straightening working procedure of the titanium bar material.

This clamping device utilizes the guide chute that base 1 and apron 3 respectively have two contained angles to be beta and controls the effect of protruding guide rail 201 on the slider 1, slider 2 can slide around along the guide chute about guaranteeing, about slider 2 passes through the sawtooth with circular bar and bites tightly, produce the forward slip trend of axial when circular bar receives the pulling force, make about the slider also bear the pulling force simultaneously and produce the power that the preceding slip was slided and is shrink to the centre, control slider clamping-force increase, step up to the bar is in reliable stable state all the time, the problem that the bar becomes flexible deformation after the slippage from clamping device in the straightening process and causes the security threat to the field work personnel has been avoided, moreover, the steam generator is simple in structure, easy manufacturing, the component is few.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. A clamping device for when circular bar hot straightening, its characterized in that: the sliding guide device comprises a base (1), a left sliding block, a right sliding block (2), a cover plate (3), a pull rod (6), a hook (7) and a spring (11), wherein the cover plate (3) is fixedly connected to the upper portion of the base (1), the left sliding block and the right sliding block (2) are arranged in the base (1), the left sliding block and the right sliding block (2) are of a conical structure with a conical degree of beta, protruding guide rails (201) with included angles of beta are arranged on the upper edges and the lower edges of conical surfaces on the two sides of the inner cavity of the base (1), the included angles of the inner walls on the two sides of the front portion of the inner cavity of the base (1) are beta, lower guide chutes (101) which are in sliding fit with the protruding guide rails (201) on the lower edge of the left sliding block and the right sliding block (2); the center part of the parting surface of the left and right sliding blocks (2) is provided with a parting round hole (202) which is matched with the round bar and clamps the round bar; it is equipped with couple (7) to control slider (2) rear portion, couple (7) front end is articulated with controlling slider (2) rear end, couple (7) rear end is articulated with pull rod (6) lower part, pull rod (6) lower extreme supports on base (1) bottom plate, pull rod (6) upper portion stretches out from apron (3), control slider (2) rear end both sides through locating spring (11) on base (1) rear plate support tightly.

2. A clamping device for hot straightening of round bars according to claim 1, characterized in that: arc saw teeth (203) are densely distributed on the inner surface of the fractal circular hole (202) in the circumferential direction.

3. A clamping device for hot straightening of round bars according to claim 1, characterized in that: the front end of the hook (7) is hinged with the rear ends of the left and right sliding blocks (2) through a shaft I (5), the rear ends of the left and right sliding blocks (2) are transversely provided with concentric round holes (204) matched with the shaft I (5), and the front end of the hook (7) is provided with a U-shaped hanging groove (701) matched and hung with the shaft I (5); the rear end of the hook (7) is hinged with the lower part of the pull rod (6) through a shaft II (8), and the rear end of the hook (7) is provided with a transverse round hole (702) matched with the shaft II (8) and a longitudinal U-shaped groove (703) matched with the pull rod (6).

4. A clamping device for hot straightening of round bars according to claim 1, characterized in that: the base (1) is provided with a pull rod fulcrum square hole (102) serving as a pull rod (6) fulcrum on a bottom plate, and the cover plate (3) is provided with a pull rod passing square hole (302) facilitating extension of the pull rod (6).

5. A clamping device for hot straightening of round bars according to claim 1, characterized in that: the front end of the spring (11) abuts against the rear end face of the left sliding block and the right sliding block (2), the rear end of the spring (11) is connected with the rear plate of the base (1) through the guide column (10), the guide column (10) is fixed on the rear plate of the base (1), the rear plate of the base (1) is provided with a mounting round hole (103) for fixing the guide column (10), and the rear end of the spring (11) is sleeved on the guide column (10).

6. A clamping device for hot straightening of round bars according to claim 1, characterized in that: the cover plate (3) is matched with the upper part of the base (1) in shape, and the cover plate (3) is fastened with the base (1) through a screw (4) after determining the correct position through a pin (9) and the base (1).

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