CN114952343A - A kind of jig and method for processing telescopic bracket - Google Patents

Abstract

The invention provides a clamp for machining a telescopic support, which comprises a bottom plate and a rotary support plate, wherein the rotary support plate is rotatably arranged at the top of the bottom plate; the limiting assembly comprises a first limiting piece arranged at the top of the rotary supporting plate and a second limiting piece arranged at the top of the bottom plate; the positioning assembly is arranged at the top of the rotary support plate and used for vertically fixing a workpiece, and the positioning assembly also comprises a connecting disc used for fixing a clamp, and the connecting disc is arranged on the machining center; the invention also provides a method for processing the telescopic bracket. The invention switches two positions of the workpiece through the first limiting piece and the second limiting piece, realizes the switching of the horizontal direction and the inclined direction when the workpiece is processed, meets the requirements of large-surface processing of the rectangular tube in four directions and processing of the inner hole and the end face of the shaft sleeve in the inclined direction, can reduce the clamping times of the telescopic bracket compared with the existing processing mode, does not need repeated positioning, and has the advantages of high work efficiency and good quality consistency of processed products.

Description

A kind of jig and method for processing telescopic bracket

technical field

The invention relates to the technical field of mechanical processing, in particular to a jig and a method for processing a telescopic bracket.

Background technique

The shape of the telescopic bracket for forklift is cast integrally with the rectangular tube and the shaft sleeve, and the axis of the shaft sleeve and the center line of the rectangular tube form an angle of 12°, and the workpiece weighs about 200kg. After the workpiece is cast, it is necessary to process the four sides of the rectangular tube and the inner hole and end face of the inclined bushing. During processing, it is necessary to ensure that the holes on both sides of the bushing are coaxial. The existing processing method is: first take one face of the casting blank as the benchmark, flanging after milling, take the milled surface as the benchmark, mill the opposite side of the rectangular tube, and then take the milled surface as the benchmark, mill the other two of the rectangular tube. Since the axis of the shaft sleeve and the center line of the rectangular tube form an angle of 12°, when milling the shaft sleeve, it is necessary to take the milled rectangular tube surface as the benchmark, and tilt the workpiece by 12° to mill one end face of the shaft sleeve and the surface of the rectangular tube. Rough boring and then clamping again to mill the other end face of the bushing. Therefore, there are many steps in the whole processing process, six clamping and repeated positioning are required, the work efficiency is low, and the quality consistency of the processed products is not good.

SUMMARY OF THE INVENTION

The invention provides a jig which can reduce the number of times of clamping, so as to realize the processing of the four faces of the rectangular tube, the inner hole and the end face of the shaft sleeve, and a method for processing a telescopic bracket by using the jig.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A jig for processing a telescopic bracket, comprising a bottom plate, and further comprising:

a rotary support plate, which is rotatably arranged on the top of the bottom plate for fixing the telescopic support;

a limit assembly, the limit assembly includes a first limit member disposed on the top of the rotary support plate for fixing the rectangular tube and a second limit member disposed on the top of the bottom plate for fixing the rotary support plate after rotation; and

The positioning assembly is arranged on the top of the rotary support plate and is used to vertically fix the shaft sleeve.

Preferably, it also includes a connecting plate for fixing the fixture, and the connecting plate is arranged on the machining center.

Preferably, the slewing support plate is rotatably arranged on the top of the bottom plate through a slewing bearing.

Preferably, the top of the bottom plate is further provided with a limit groove for guiding when the rotary support plate rotates.

Preferably, the first limiting member includes two first limiting blocks diagonally arranged on the side wall of the rotary support plate for fixing the upper rectangular tube of the telescopic support from the side.

Preferably, the second limiting member includes two second limiting blocks diagonally arranged on the side wall of the bottom plate and used for fixing the swivel support plate from the side wall to realize the inclined arrangement of the workpiece.

Preferably, the positioning assembly includes a vertical rod vertically arranged on the top of the slewing support plate, a pressing rod positioned on the top of the vertical rod, and a pressing plate positioned at the end of the pressing rod for fixing the upper shaft sleeve of the telescopic support from the top.

Preferably, the top of the rotary support plate is further provided with a plurality of limit posts arranged along the side walls of the shaft sleeve.

A method for processing a telescopic bracket using the aforementioned fixture, comprising the following steps:

Place the telescopic bracket on the top of the slewing bracket, use the first limiter and the positioning component to fix the rectangular tube and the shaft sleeve respectively, and make the center line of the rectangular tube and the lateral center line of the bottom plate parallel to the distribution;

Use an external milling device to mill one side of the rectangular tube;

Using one side of the previously milled rectangular tube as the base bottom surface, using the first limiting member and the positioning assembly to fix the rectangular tube and the shaft sleeve respectively, and make the axis of the shaft sleeve and the transverse centerline of the bottom plate vertically distributed;

Use an external milling device to process the remaining side surfaces of the rectangular tube, the inner hole of the bushing and the end surface.

Preferably, it also includes using the rotary support plate to slide along the limiting groove so that the centerline of the rectangular tube is parallel to the lateral centerline of the base plate or the axis of the bushing is perpendicular to the lateral centerline of the base plate, and using fasteners to align the rotary support Steps for plate fixation.

It can be seen from the above technical solutions that the present invention has the following beneficial effects: the fixture in the present invention is installed on the machining center through the connecting plate, the fixture includes a bottom plate and a rotary support plate that can be rotated along the bottom plate, and when in use, the telescopic bracket is installed on the rotary On the support plate, the rectangular tube is fixed by the first limit member, and the shaft sleeve is fixed by the positioning assembly and the limit column. When the rectangular tube is milled first, the rectangular tube is adjusted to its centerline and the lateral center of the bottom plate. The lines are distributed in parallel, and the rotary support plate is fixed on the bottom plate by fixing parts such as positioning pins. After the milling of one side of the rectangular tube is completed, the other three sides can be processed by using the milled side as a reference. In the present invention, the rotary support plate can be rotated relative to the bottom plate, so that the rotary support plate can be used to drive the bushing to move to the point where its axis is perpendicular to the transverse centerline of the bottom plate, and the position of the rotary support plate can be limited by the second limiting member , and fixed by fixing parts such as positioning pins, so that the rectangular tube can be adjusted to be inclined to the bottom plate, so as to facilitate the processing of the inner hole and end face of the shaft sleeve; The limiter switches the workpiece between two positions, realizes the switching between the horizontal direction and the inclined direction during processing, and satisfies the large-scale processing of the four directions of the rectangular tube and the processing of the inner hole and end face of the shaft sleeve in the inclined direction.

Description of drawings

Fig. 1 is the front view of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the structural representation of A-A section in Fig. 1;

FIG. 4 is a flow chart of the method provided by the present invention.

In the figure: 10, bottom plate; 20, slewing support plate; 210, slewing bearing; 220, limit slot; 230, limit column; 310, first limit piece; 320, second limit piece; 40, positioning assembly ; 410, pole; 420, pressure rod; 430, pressure plate; 50, connecting plate.

Detailed ways

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Example:

1 and 3, a jig for processing a telescopic support includes a base plate 10, a rotary support plate 20, a limit component, and a positioning component 40. The rotary support plate is rotatably arranged on the top of the bottom plate, and the limit component includes a set of The first stopper 310 on the top of the swivel support plate and the second stopper 320 on the top of the bottom plate, the positioning components are arranged on the top of the swivel support plate, and are used to fix the workpiece vertically. When in use, the telescopic support is provided On the rotary support plate, the rectangular tube is fixed by the first limit piece. When milling the telescopic bracket, one surface of the rectangular tube is first processed, and then the processed rectangular tube surface is used as the benchmark to carry out the follow-up. The processing of the three faces and the inner hole and end face of the shaft sleeve, specifically, when processing the shaft sleeve, the shaft sleeve on the telescopic bracket can be rotated to a suitable position by the rotation of the rotary support plate relative to the bottom plate, and the second The limiter fixes the rotary support plate, so as to facilitate the processing of the inner hole and the end face of the shaft sleeve. Compared with the prior art, the clamp provided by the present invention can reduce the number of times of clamping the telescopic support, and does not need to repeat positioning many times, and has work efficiency. High, the advantages of good consistency of product quality after processing.

As a preferred technical solution of the present invention, the clamp further includes connecting plates 50 arranged at both ends of the bottom plate, and the connecting plates are arranged on the machining center, so that after the telescopic support is fixed by the clamp, the rotation of the connecting plate can be used to realize The position of the telescopic bracket is adjusted so that the telescopic bracket can be adjusted to a position suitable for processing.

Further, in order to realize the rotation of the slewing support plate 20 relative to the base plate 10, a slewing bearing 210 is provided on the top of the base plate, and the slewing support plate is used to realize the rotation of the slewing support plate relative to the base plate, so that after the processing of the rectangular tube of the telescopic bracket is completed, , Use the rotation of the rotary support plate to adjust the telescopic bracket to the position suitable for the processing of the shaft sleeve.

Referring to FIG. 2, further, in order to improve the rotation stability of the rotary support plate 20 relative to the bottom plate 10, an arc-shaped limit groove 220 is provided at the top of the bottom plate. In this way, the movement of the slider along the limit groove can be used to realize the stable rotation of the rotary support plate. In addition, a positioning pin can also be set between the rotary support plate and the bottom plate. When the telescopic bracket is fixed on the rotary support plate, it can be Through the fixing action of the positioning pin, the rotary support plate is fixed to prevent the telescopic support from shifting in the process of processing.

As a preferred technical solution of the present invention, the first limiting member 310 includes two first limiting blocks diagonally arranged on the side walls of the swivel support plate 20, and the first limiting blocks are used to fix the telescopic support from the side. The rectangular tube prevents displacement of the rectangular tube during processing. It should be noted that the first limit block in the present invention is set to fit on the two side walls of the rectangular tube in the diagonal direction, so that it can When the horizontal center line of the plate is parallel to the horizontal center line of the bottom plate, adjust the rectangular tube to a horizontal state.

Further, the second limiting member 320 includes two second limiting blocks diagonally arranged on the side wall of the bottom plate 10 , and the second limiting blocks are used to fix the rotary support plate from the side wall, so that in the rotary support After the plate is rotated relative to the bottom plate through the slewing support, when the two side walls in the diagonal direction of the bottom plate are respectively in contact with the second limit block, adjust the shaft sleeve on the telescopic bracket to a suitable position for processing, that is, the axis of the shaft sleeve and the second limit block are adjusted. The lateral centerline of the bottom plate is vertical, and then the slewing support plate is fixed by positioning members such as positioning pins, so as to realize the fixing of the telescopic bracket and facilitate the processing of the inner hole and end face of the shaft sleeve; A second limit block is set to leave a certain gap with the two side walls in the diagonal direction of the rotary support plate, so that when the rotary support plate rotates along the bottom plate, the rectangular tube can be adjusted to an inclined distribution, so as to facilitate the alignment of the shaft sleeve For processing, specifically, as far as the present invention is concerned, the included angle between the connection line between the two second limit blocks and the lateral centerline of the bottom plate is 12°, thereby satisfying the need for processing the shaft sleeve on the telescopic support. Of course, the included angle between the connection line between the two second limit blocks and the lateral centerline of the bottom plate in the present invention is not limited to 12°, and can be adjusted according to the size and structure of the actual product.

As a preferred technical solution of the present invention, the positioning assembly 40 includes a vertical rod 410, a pressing rod 420 and a pressing plate 430 vertically arranged on the top of the rotary support plate 20, the pressing rod is arranged on the top of the vertical rod, the pressing plate is arranged at the end of the pressing rod, and the pressing It is used to fix the shaft sleeve on the telescopic bracket from the top, so that the rectangular tube in the telescopic bracket can be fixed by the first limit piece, and the shaft sleeve can be fixed vertically through the pressing plate. Further, in order to achieve The shaft sleeve is fixed in all directions, and a plurality of limit posts 230 distributed along the circumferential direction of the side wall of the shaft sleeve can also be arranged on the top of the rotary support plate, and the shaft sleeve is fixed from the side through the limit posts. And the combination of the limit, can ensure the stable setting of the bushing.

Working principle: when in use, the telescopic bracket is arranged on the rotary support plate 20, the rectangular tube is fixed by the first limiting member 310, the shaft sleeve is fixed by the positioning assembly 40 and the limiting column 230, and the rectangular tube is milled first. Adjust the rectangular tube so that its centerline is parallel to the lateral centerline of the bottom plate 10, and fix the rotary support plate 20 on the bottom plate by fixing parts such as positioning pins. After milling one side of the rectangular tube, the milling can be used The rear side is used as a reference, and the other three surfaces are processed. In addition, since the rotary support plate 20 in the present invention can be rotated relative to the bottom plate 10, the rotary support plate can be used to drive the bushing to move to its axis and the lateral center of the bottom plate. The line is vertical, and the position of the rotary support plate 20 is limited by the second limiting member 320, and fixed by fixing members such as positioning pins, so that the rectangular tube can be adjusted to be inclined to the bottom plate, so as to facilitate the adjustment of the inner hole of the shaft sleeve. Therefore, the present invention can realize that one side of the rectangular tube can be processed as the reference plane, and the second order can be integrated to process other positions. Compared with the existing processing methods, the number of clamping times can be reduced, the work efficiency can be improved, and the product quality after processing can be consistent. Good performance and high product precision.

Referring to FIG. 4, the present invention also provides a method for processing a telescopic bracket using the aforementioned fixture, comprising the following steps:

S10: Place the telescopic bracket on the top of the slewing bracket, use the first limiter and the positioning assembly to fix the rectangular tube and the shaft sleeve respectively, and make the center line of the rectangular tube and the lateral center line of the bottom plate parallel to the distribution.

Specifically, place the telescopic bracket on the top of the swivel bracket, use the first limit block of the first limiter to fix the two side walls of the rectangular tube from the diagonal sides, and use the pressure plate of the positioning assembly to fix the shaft sleeve vertically. At the same time, the rotary support plate is used to rotate along the limit groove, so that the center line of the rectangular tube is parallel to the lateral center line of the bottom plate, and the position of the rotary support plate is fixed by external fasteners, such as positioning pins.

S20: Use an external milling device to mill one side of the rectangular tube.

Specifically, the telescopic support fixed in the above step S10 uses an external milling device to perform the milling operation on one side of the rectangular tube, and the milling device may use a milling cutter.

S30: Use one side of the previously milled rectangular tube as the base bottom surface, use the first limiting member and the positioning assembly to fix the rectangular tube and the shaft sleeve respectively, and make the axis of the shaft sleeve and the transverse centerline of the bottom plate vertically distributed.

Specifically, one side of the rectangular tube milled in step S20 can be used as a reference surface for subsequent processing, that is, one side of the processed rectangular tube is placed on the rotary support plate as the bottom surface, and the limit blocks of the first limiter are used to extend from the two corners. The side walls of the rectangular tube are fixed, and the shaft sleeve is fixed vertically by the pressure plate of the positioning assembly. At the same time, the rotary support plate is used to rotate along the limit groove, so that the axis of the shaft sleeve is vertically distributed with the lateral centerline of the bottom plate. At this time, the second limit block in the second limit piece is located on the diagonal line opposite to the first limit block, so as to fix the rotated position of the rotary support plate, and then use external fasteners, such as positioning Pin for vertical fixation.

S40: Use an external milling device to process the remaining side surface of the rectangular tube, the inner hole of the bushing and the end surface.

Specifically, after using one side of the milled rectangular tube as the reference bottom surface for fixing, an external milling device, such as a milling cutter, can be used to mill the subsequent three sides of the rectangular tube, the inner hole of the bushing and the end face. It should be noted that , since the fixture is set on the machining center through the connecting plate, the rotation of the connecting plate can be used to make the fixture rotate relative to the machining center, so as to facilitate the milling operation on the remaining three sides of the rectangular tube.

The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. On the premise of not departing from the design spirit of the present invention, various modifications made by those of ordinary skill in the art to the technical solutions of the present invention and improvements, all should fall within the protection scope determined by the claims of the present invention.

Claims (10)

1. A jig for processing a telescopic bracket, comprising a base plate (10), characterized in that it also includes: a rotary support plate (20), which is rotatably arranged on the top of the bottom plate for fixing the telescopic support; Limiting assembly, the limiting assembly includes a first limiting member (310) arranged on the top of the rotary support plate for fixing the rectangular tube and a second limiting member provided on the top of the bottom plate for fixing the rotating support plate after rotation (320); and A positioning assembly (40) is provided on the top of the rotary support plate, and is used for vertically fixing the shaft sleeve. 2. The fixture according to claim 1, further comprising a connecting plate (50) for fixing the fixture, the connecting plate being arranged on the machining center. 3 . The clamp according to claim 1 , wherein the slewing support plate ( 20 ) is rotatably arranged on the top of the bottom plate through a slewing bearing ( 210 ). 4 . 4. The clamp according to claim 3, characterized in that, the top of the bottom plate (10) is further provided with a limit groove (220) for guiding when the rotary support plate rotates. 5. The clamp according to claim 1, wherein the first limiting member (310) comprises two diagonally arranged side walls of the slewing support plate (20) for fixing the upper moment of the telescopic support from the side The first stop of the tube. 6 . The clamp according to claim 5 , wherein the second limiting member ( 320 ) comprises two diagonally arranged side walls of the bottom plate ( 10 ) for fixing the slewing support plate from the side walls to realize 6 . The second limit block that the workpiece is inclined to set. 7. The clamp according to claim 1, characterized in that, the positioning assembly (40) comprises a vertical rod (410) vertically arranged on the top of the slewing support plate (20), and a pressure rod (420) arranged on the top of the vertical rod ) and a pressing plate (430) provided at the end of the pressing rod for fixing the upper shaft sleeve of the telescopic support from the top. 8 . The clamp according to claim 7 , wherein a plurality of limit posts ( 230 ) arranged along the side walls of the shaft sleeve are further provided on the top of the rotary support plate ( 20 ). 9 . 9. A method for processing a telescopic support using the fixture as claimed in any one of claims 1-8, wherein the method comprises the following steps: Place the telescopic bracket on the top of the slewing bracket, use the first limiter and the positioning component to fix the rectangular tube and the shaft sleeve respectively, and make the center line of the rectangular tube and the lateral center line of the bottom plate parallel to the distribution; Use an external milling device to mill one side of the rectangular tube; Using one side of the previously milled rectangular tube as the base bottom surface, using the first limiting member and the positioning assembly to fix the rectangular tube and the shaft sleeve respectively, and make the axis of the shaft sleeve and the transverse centerline of the bottom plate vertically distributed; Use an external milling device to process the remaining side surfaces of the rectangular tube, the inner hole of the bushing and the end surface. 10 . The method according to claim 9 , further comprising using the pivot plate to slide along the limiting groove so that the centerline of the rectangular tube is parallel to the lateral centerline of the base plate or the axis of the bushing is parallel to the lateral center of the base plate. 11 . The lines are distributed vertically, and the steps of fixing the pivot plate with fasteners.

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