CN220880628U

CN220880628U - Double-station drilling and positioning device for high manganese steel frog

Info

Publication number: CN220880628U
Application number: CN202322704510.4U
Authority: CN
Inventors: 方明; 严陇强; 王仙利; 高瑞平
Original assignee: China Railway Baoji Bridge Group Co Ltd
Current assignee: China Railway Baoji Bridge Group Co Ltd
Priority date: 2023-10-09
Filing date: 2023-10-09
Publication date: 2024-05-03
Anticipated expiration: 2033-10-09

Abstract

Providing a double-station drilling positioning device of a high manganese steel frog, which comprises a base; bearing seats are respectively arranged on two sides of the base in the length direction; the bearing seat rotatably supports and installs a lead screw; the two ends of the screw rod are coaxially and fixedly connected with a rotary power source; one side of the screw rod is provided with left-handed trapezoidal threads, and the other side is provided with right-handed trapezoidal threads; the screw is symmetrically provided with two sliding seats, and the sliding seats are in opposite directions or relatively synchronous displacement along the axial straight line of the screw; the top ends of the sliding seats are respectively provided with a lifting top iron; a ram is arranged on one side of the base; the ram supports the bottom of the frog and can slide and displace along the length direction of the base along with the frog. The utility model solves the technical problems that the prior frog drilling alignment is time-consuming and labor-consuming, the alignment precision is not high, the degree of freedom of a workpiece in processing is underpositioned, the processing quality is difficult to ensure, and the cutting tool is easy to damage. The structure is relatively simple, economical and practical, easy to realize, simple to operate, high in alignment precision, reliable in positioning, stable and efficient in processing quality, unlikely to damage cutting tools, ideal in universality and suitable for popularization.

Description

Double-station drilling and positioning device for high manganese steel frog

Technical Field

The utility model belongs to the technical field of auxiliary devices for frog drilling, and particularly relates to a double-station drilling positioning device for a high manganese steel frog.

Background

Railway frog is a rail plane crossing device that switches the wheels of a train from one strand of road to another. Along with the development of railways to heavy load and high speed, higher requirements are put on frog. At present, high manganese steel cast integral frog is commonly used to meet the requirements of high-speed, heavy-load and inter-zone seamless railways. When the rail is installed on the line, in order to ensure the butt joint between the frog and the standard steel rail, joint bolt holes are drilled in the rail head and fish tail spaces at the two ends of the frog so as to insert bolts to fasten the fish tail plate. But in the drilling process, the symmetrical center line of the frog needs to be accurately aligned so as to ensure that the axis of the hole drilled by the numerical control drilling machine is vertical to the center line of the rail web of the steel rail, and the bolts are accurately inserted during assembly and are uniformly stressed.

Frog drilling location under the prior art: after the frog is placed on a workbench, the symmetric center line of the heel end of the toe is visually detected to be approximately behind the T-shaped groove of the same workbench, and the top surface pressing bolt can be processed. The alignment mode causes that a certain rotation angle exists between an actual symmetrical central line and a theoretical central line, and the axis of a hole machined after the axis of a drill bit rotates according to a theoretical frog angle is not perpendicular to the central line of a rail web of a steel rail; moreover, alignment requires people to climb up the workbench, and the efficiency is low; in the drilling process, the drill bit can transversely move against the workpiece under the influence of cutting resistance, so that the reference is changed, the quality of a product is influenced, and cutting tools such as the drill bit can be broken under serious conditions. Therefore, the existing frog drilling has the following problems: alignment is time-consuming and labor-consuming, alignment precision is not high, the degree of freedom of a workpiece is underpositioned in machining, machining quality is difficult to ensure, and a cutting tool is easy to damage. In this regard, the following technical solutions are now proposed.

Disclosure of utility model

The utility model solves the technical problems that: the double-station drilling and positioning device for the high manganese steel frog solves the technical problems that the existing frog drilling and alignment is time-consuming and labor-consuming, the alignment precision is not high, the degree of freedom of a workpiece in machining is underpositioned, the machining quality is difficult to guarantee, and a cutting tool is easy to damage.

The utility model adopts the technical scheme that: a double-station drilling positioning device for a high manganese steel frog comprises a base; bearing seats are respectively arranged on two sides of the base in the length direction; the bearing seat rotatably supports and installs a lead screw; the two ends of the screw rod extend out of the bearing seat to coaxially and fixedly install a rotary power source; the rotary power source drives the screw rod to rotate; one side of the screw rod is provided with a left-handed trapezoidal thread, and the other side of the screw rod is provided with a right-handed trapezoidal thread; the screw rod is symmetrically provided with two sliding seats, and the rotating motion of the screw rod is converted into opposite or opposite synchronous displacement along the axial straight line of the screw rod by screw threads between the sliding seats and the screw rod; the top ends of the sliding seats are respectively provided with a lifting top iron; a ram is arranged on one side of the base; the ram supports the bottom of the frog and can slide and displace along the length direction of the base along with the frog.

In the above technical solution, further: the top end of the sliding seat realizes the lifting displacement of the top iron through the screw nut screw pair transmission vertically installed.

In the above technical solution, further: the bottom of the sliding seat is provided with a protruding sliding block; a guide groove is formed in the center of the base in the length direction; the sliding block is in sliding fit with the guide groove, and the guide groove provides guidance for linear displacement of the sliding seat.

In the above technical solution, further: the symmetrical center of the screw rod is provided with a supporting and limiting seat; the supporting and limiting seat is connected with the base into a whole; the screw rod is in rotary fit with the inner hole of the supporting limit seat; the supporting and limiting seat is used for preventing the middle part of the screw rod from collapsing.

In the above technical solution, further: the ram is provided with a strip-shaped slotted hole along the length direction of the base; the ram is slidably displaced along a linear guide provided by a slot in a bar shape.

In the above technical solution, further: the rotary power source is a hand wheel or a gear motor.

Compared with the prior art, the utility model has the advantages that:

1. The device is arranged at two sides of a frog workpiece to be processed in pairs at a certain distance along the length direction of the frog, and the device is fixed on a workbench by using a fastener; after the frog workpiece is fed into the device, the screw rod is driven to rotate by the rotary power source, and the clamping sliding seats at two sides of the screw rod are symmetrically close to and clamp the frog workpiece; the accurate alignment and the correct position of the high manganese steel frog on the machine tool workbench can be accurately aligned and positioned, the alignment efficiency is improved, the positioning accuracy and the clamping rigidity are improved, the hole axis is ensured to be perpendicular to the center line of the rail web of the steel rail, the deviation of a machined workpiece is avoided, time and labor are saved, the efficiency is improved, and the machine tool is safe and reliable.

2. The top iron can be lifted freely and is used for being suitable for frog with different heights and different shapes, so that the side wall of the frog is abutted to prevent the frog from overturning, and further, reliable support is provided for aligning and centering the frog, and workpiece overturning is prevented, so that the verticality of drilling is ensured.

3. The ram is used for heightening, preventing abrasion and supporting the bottom of the frog, and has a follow-up function when the ram is displaced with the frog, so that friction damage on the bottom surface of the frog is reduced; meanwhile, the ram is lifted to support the bottom of the frog, and the device can play a role in reducing the torque resistance of the screw rod in rotation during aligning and centering of the frog, thereby conveniently reducing the centering resistance and preventing the bottom surface of a workpiece from scraping and wearing.

4. The center of the screw rod is provided with the supporting and limiting seat, and the screw rod has the function of rotating and supporting the lengthened screw rod to prevent the screw rod from bending and deforming.

Drawings

FIG. 1 is an isometric view of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a rear view of the present utility model;

FIG. 4 is a top view of the present utility model;

FIG. 5 is a front view showing the state of use of the centering grip frog of the present utility model;

FIG. 6 is a top view of the centering grip frog of the present utility model in use;

FIG. 7 is a side view of the centering grip frog of the present utility model in use;

FIG. 8 is an enlarged detail view of a portion of FIG. 6 in accordance with the present utility model;

In the figure: 1-bearing seat, 2-slide seat, 201-slide block, 3-top iron, 4-ram and 401-strip-shaped slotted hole; the device comprises a 5-lead screw, a 6-supporting limit seat, a 7-base, a 701-guide groove and an 8-rotary power source.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 8 of the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

(As shown in fig. 1) a double-station drilling positioning device for a high manganese steel frog comprises a base 7 which is in a horizontal strip shape and has a certain length, and the base 7 is fixed on a workbench through a fastener.

Bearing seats 1 are respectively arranged on two sides of the base 7 in the length direction. The bearing seat 1 rotatably supports a mounting screw 5; the screw rod 5 is rotatably supported by adopting the bearing, so that the friction resistance of the screw rod 5 in rotation is reduced, and the screw rod 5 is flexible and light in rotation.

The two ends of the screw rod 5 extend out of the bearing seat 1, a rotary power source 8 is coaxially and fixedly arranged, and the rotary power source 8 drives the screw rod 5 to rotate. In the above technical solution, further: the rotary power source 8 is a hand wheel or a gear motor.

Example 1: the rotary power source 8 is a hand wheel.

Example 2: the rotary power source 8 is a gear motor.

The screw 5 is provided with a rotary power source 8 at both ends, and the screw 5 can be driven to rotate no matter which side is standing.

Left-handed trapezoidal threads are formed on one side of the screw rod 5, and right-handed trapezoidal threads are formed on the other side of the screw rod 5. And trapezoidal threads are adopted, so that the transmission is stable and reliable.

The screw rod 5 is symmetrically provided with two sliding seats 2, and the rotary motion of the screw rod 5 is converted into opposite or opposite synchronous displacement of the sliding seats 2 along the axial straight line of the screw rod 5 through screw threads between the sliding seats 2 and the screw rod 5.

Specifically, the inner hole of the sliding seat 2 realizes that the rotation of the screw rod 5 is converted into the axial linear displacement motion of the sliding seat 2 along the screw rod 5 through the installed bearing piece. The outer ring of the bearing is fixedly connected with the inner hole of the sliding seat 2 in an interference fit manner; the bearing inner ring is coaxially and fixedly connected with a large nut piece, and the screw thread of the lead screw 5 is connected through the rotation of the large nut piece. The screwed screw rod 5 realizes the linear displacement of the large nut fixedly connected with the inner ring of the bearing in interference fit, so that the slide seat 2 is dragged along the screw rod 5 to linearly displace through the large nut in linear displacement and the bearing. The slide 2 is linearly displaced along the screw 5 for centering the clip to grip or release the frog.

The top ends of the sliding seats 2 are respectively provided with a lifting top iron 3; the liftable top iron 3 is used for adjusting the adaptive height positions of the frog suitable for different heights, so that the top iron 3 is attached to the vertical outer side wall of the tight frog, and therefore the frog with a certain height is prevented from tilting, and the influence on the verticality of the drilling hole of the centered tight frog is avoided.

A ram 4 is arranged on one side of the base 7; the ram 4 supports the bottom of the frog and the ram 4 can slide and displace along the length direction of the base 7 along with the frog.

(As shown in fig. 4) in the above embodiment, further: the ram 4 is provided with a strip-shaped slotted hole 401 along the length direction of the base 7; the ram 4 slides linearly along the length direction of the base 7 along the linear guide follow-up withdrawing fork provided by the strip-shaped slotted hole 401. During installation, the ram bolt keeps a section of axial height, so that linear sliding displacement of the ram 4 relative to the ram bolt is realized.

In the above embodiment, further: the lifting displacement of the top iron 3 is realized by the top end of the sliding seat 2 through the transmission of a screw nut screw pair which is vertically arranged. The concrete connection structure of the screw nut screw pair is as follows: the top end of the sliding seat 2 is of a square groove structure, and a vertical screw rod is rotatably arranged in the square groove; the vertical screw rod is screwed and is suitably matched with a large nut which is lifted along the vertical screw rod, the outer side of the large nut is rotationally connected with a lifting block through a bearing to drive the lifting block to synchronously lift, and the lifting block is fixedly connected with the outer side wall of the top iron 3, so that the top iron 3 is driven to synchronously lift and displace through the large nut and the lifting block which linearly lift.

In the above embodiment, further: the top end of the vertical screw rod in the screw nut screw pair is driven to rotate through a hand wheel, or the top end of the vertical screw rod is driven to rotate through a gear motor. When the gear motor drives to rotate, the vertical lifting adjustment operation of the top iron 3 becomes more labor-saving.

In the above embodiment, further: the bottom of the sliding seat 2 is provided with a protruding sliding block 201 (shown in fig. 1); a guide groove 701 is formed in the center of the base 7 in the length direction; the sliding block 201 is in sliding fit with the guide groove 701, and the guide groove 701 provides linear guide for linear displacement of the sliding seat 2, so that the positioning accuracy of centering and clamping the frog of the sliding seat 2 is further ensured.

In the above embodiment, further: the symmetrical center of the screw rod 5 is provided with a supporting and limiting seat 6; the supporting and limiting seat 6 and the base 7 are fastened and connected into a whole through a fastener; the screw rod 5 is in running fit with an inner hole of the supporting and limiting seat 6; the specific rotation fit mode can be a bearing or a sliding sleeve. When the bearing is adopted, the screw rod rotates more flexibly and lightly. The supporting and limiting seat 6 is used for preventing the middle part of the screw rod 5 from collapsing.

The working principle of the utility model is as follows: the device is arranged at two sides of a workpiece to be processed, namely, frog, along the length direction of the frog in pairs at a certain distance (as shown in figure 7), and then the device is fixed with a workbench by bolts; then feeding the frog workpiece on the device, and feeding the frog by the device: firstly, the height of the top iron 3 is adjusted by rotating until the top iron 3 is adjusted to the height of the outer side wall of the rail web of the frog, so that the phenomenon of overturning the frog is avoided after the frog is clamped in a centering manner in the later period of the frog (as shown in fig. 5); then, by rotating a hand wheel or driving a gear motor to rotate, under the rotation of a left screw rod 5 and a right screw rod 5, the clamping sliding seats 2 at the two sides are linearly displaced inwards in a centering way along the screw rod 5 until the clamping sliding seats 2 at the two sides are symmetrically close to each other and clamp a workpiece frog; thus, the centering, positioning and clamping operation of the frog is completed. And then the drilling can be carried out on the workpiece, so that the drilling verticality is effectively ensured, and the deviation of a processed workpiece is avoided. The centering clamping operation is time-saving and labor-saving, the efficiency is improved, and the centering clamping device is safe and reliable. After the drilling is finished, the rotary power source 8 is rotated in the opposite direction, which is equivalent to reversely rotating the screw rod 5, and the sliding seat 2 moves outwards along the screw rod 5 until the frog is loosened. The supporting and limiting seat 6 limits the screw rod 5 to collapse; the ram 4 supports the bottom of the frog to be positioned, and the follow-up effect can effectively prevent the bottom of the frog from being worn.

From the above description it can be found that: the device is arranged at two sides of a frog workpiece to be processed in pairs at a certain distance along the length direction of the frog, and the device is fixed on a workbench by using a fastener; after the frog workpiece is fed into the device, the screw rod 5 is driven to rotate by the rotary power source 8, and the clamping sliding seats 2 on two sides of the screw rod 5 symmetrically approach and clamp the frog workpiece under the rotation action of the screw rod 5; the accurate alignment and the correct position of the high manganese steel frog on the machine tool workbench can be accurately aligned and positioned, the alignment efficiency is improved, the positioning accuracy and the clamping rigidity are improved, the hole axis is ensured to be perpendicular to the center line of the rail web of the steel rail, the deviation of a machined workpiece is avoided, time and labor are saved, the efficiency is improved, and the machine tool is safe and reliable.

The top iron 3 can be lifted freely and is used for being suitable for frog with different heights and different shapes, so that the side wall of the frog is abutted to prevent the frog from overturning, thereby providing reliable support for aligning and centering the frog, preventing a workpiece from tilting and overturning, and further ensuring the verticality of a drilled hole.

The ram 4 is used for heightening, preventing abrasion and supporting the bottom of the frog, and the ram 4 plays a follow-up role when the ram is displaced with the frog, so that friction damage on the bottom surface of the frog is reduced; meanwhile, the ram 4 is used for heightening and supporting the bottom of the frog, and the device can also play a role in reducing the torque resistance of the screw rod 5 in rotation during aligning and centering of the frog, thereby conveniently reducing the centering resistance and preventing the bottom surface of a workpiece from scraping and wearing.

The center of the screw rod 5 is provided with the supporting and limiting seat 6, which plays a role in rotationally supporting the lengthened screw rod 5 and preventing the screw rod from bending and deforming.

In conclusion, the utility model solves the technical problems that the existing frog drilling alignment is time-consuming and labor-consuming, the alignment precision is not high, the degree of freedom of a workpiece in processing is underpositioned, the processing quality is difficult to ensure, and the cutting tool is easy to damage. The structure is relatively simple, economical and practical, easy to realize, convenient to operate, high in alignment precision, reliable in positioning, stable, reliable and efficient in processing quality, unlikely to damage cutting tools, ideal in universality and suitable for popularization.

In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.

Claims

1. The double-station drilling and positioning device for the high manganese steel frog comprises a base (7); the method is characterized in that: bearing seats (1) are respectively arranged on two sides of the base (7) in the length direction; the bearing seat (1) rotatably supports a mounting screw (5); the two ends of the screw rod (5) extend out of the outside of the bearing seat (1), a rotary power source (8) is coaxially and fixedly arranged, and the rotary power source (8) drives the screw rod (5) to rotate; one side of the screw rod (5) is provided with left-handed trapezoidal threads, and the other side of the screw rod (5) is provided with right-handed trapezoidal threads; the screw rod (5) is symmetrically provided with two sliding seats (2), and the rotating motion of the screw rod (5) is converted into opposite or opposite synchronous displacement of the sliding seats (2) along the axial straight line of the screw rod (5) through screw threads between the sliding seats (2) and the screw rod (5); the top ends of the sliding seats (2) are respectively provided with a lifting top iron (3); a ram (4) is arranged on one side of the base (7); the ram (4) supports the bottom of the frog, and the ram (4) can slide and displace along the length direction of the base (7) along with the frog.

2. The double-station drilling positioning device for the high manganese steel frog according to claim 1, wherein: the top end of the sliding seat (2) realizes lifting displacement of the top iron (3) through the screw pair transmission of a screw nut which is vertically arranged.

3. The double-station drilling positioning device for the high manganese steel frog according to claim 1, wherein: the bottom of the sliding seat (2) is provided with a convex sliding block (201); a guide groove (701) is formed in the center of the base (7) in the length direction; the sliding block (201) is in sliding fit with the guide groove (701), and the guide groove (701) provides guide for linear displacement of the sliding seat (2).

4. The double-station drilling positioning device for the high manganese steel frog according to claim 1, wherein: the symmetrical center of the screw rod (5) is provided with a supporting and limiting seat (6); the supporting and limiting seat (6) is connected with the base (7) into a whole; the screw rod (5) is in rotary fit with an inner hole of the supporting and limiting seat (6); the supporting and limiting seat (6) is used for preventing the middle part of the screw rod (5) from collapsing.

5. The double-station drilling positioning device for the high manganese steel frog according to claim 1, wherein: the ram (4) is provided with a strip-shaped slotted hole (401) along the length direction of the base (7); the ram (4) slides linearly along a linear guide provided by the strip-shaped slotted hole (401).

6. The double-station drilling positioning device for the high manganese steel frog according to claim 1, wherein: the rotary power source (8) is a hand wheel or a gear motor.