Compressing and positioning device for machining arc-shaped plate of special vehicle

Abstract

The utility model relates to a pressing and positioning device for machining an arc-shaped plate of a special vehicle, which comprises a bottom plate and an auxiliary mechanism, the bottom plate is clamped on a machine tool operating table and used for pressing and positioning a plastic plate, and the auxiliary mechanism comprises a sliding groove, a sliding block and a spring; the chute is arranged at the top of the bottom plate close to the thin-wall edge of the arc-shaped plate; the sliding block is arranged in the sliding groove and can slide along the sliding groove. The two ends of the spring make contact with the bottom of the sliding block and the bottom of the sliding groove respectively. The sliding block can completely slide into the sliding groove under the action of external force, after the external force on the sliding block is removed, the upper portion of the sliding block can upwards stretch out of the sliding groove under pushing of the spring and block the outer side of the thin-wall edge of the arc-shaped plate, and at the moment, the side, facing the thin-wall edge of the arc-shaped plate, of the sliding block is tightly attached to the outer side of the thin-wall edge of the arc-shaped plate. The outer side of the thin-wall edge can be jacked on the bottom plate before the thin-wall edge is machined, so that the thin-wall edge is effectively prevented from being cracked or fractured when the inner side of the thin-wall edge is machined, the rejection rate is reduced, and the product percent of pass is greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of parts machining, in particular to a pressing and positioning device for machining arc-shaped plates of special vehicles. Background Art

[0002] Figure 1 This is a structural diagram of a curved plate part for a special vehicle. The curved plate is composed of Figure 2 The square plastic plate shown is processed. Figure 1 The arc-shaped plate shown has four sides, the front and rear sides are arc-shaped sides with the same bending direction, the left and right sides are straight sides, and the lower surface is a plane. The upper surfaces of the four sides of the arc-shaped plate part are all convex upward and form a large groove with the same shape as the arc-shaped plate between the four convex edges. The thickness of the four convex edges of the arc-shaped plate is greater than 7mm. The right side of the large groove is further concave toward the right convex edge to form a small groove connected to the large groove. The existence of the small groove reduces the thickness of the right convex edge of the arc-shaped plate facing the small groove to about 2mm. Small holes are evenly drilled on the tops of the four convex edges of the arc-shaped plate.

[0003] The current method for processing the curved plate is to first clamp a flat plate on the machine tool operating table, then place the plastic plate on the flat plate, and press the plastic plate to the flat plate with bolts at the four corners of the plastic plate. After that, processing can be carried out. During processing, large grooves and small grooves are first milled on the top of the plastic plate, and then small holes are milled out for the four convex edges of the curved plate. It is best to mill the shape of the curved plate along a predetermined line to separate the curved plate from the plastic plate to obtain a finished curved plate with four convex edges.

[0004] Since the thickness of the right convex edge of the curved plate facing the small groove (hereinafter referred to as the thin-walled edge) is about 2 mm, and the material of the curved plate itself is relatively brittle, when processing the outer side of the thin-walled edge (curved plate edge processing), the thin-walled edge is easily cracked or even broken under the action of the tool, which leads to the scrapping of the curved plate and reduces the product qualification rate. Therefore, how to ensure that the thin-walled edge of the curved plate is prevented from cracking or breaking during processing is a technical problem that urgently needs to be solved. Utility Model Content

[0005] In order to solve the above problems, the purpose of the present utility model is to provide a clamping and positioning device for processing curved plates of special vehicles, which can effectively prevent the thin-walled edges of the curved plates from cracking or breaking and improve the product qualification rate.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A pressing and positioning device for processing curved plates of special vehicles, wherein the curved plate is processed from a plastic plate and has a thin-walled edge. The pressing and positioning tooling includes a base plate and an auxiliary mechanism clamped on a machine tool operating table for pressing and positioning the plastic plate, wherein the auxiliary mechanism includes a slide groove, a slider and a spring; the slide groove is arranged at a position near the top of the base plate and the thin-walled edge of the curved plate; the slider is arranged in the slide groove and can slide up and down along the slide groove; the spring is arranged in the slide groove, and its two ends contact the bottom of the slider and the bottom of the slide groove respectively; the slider can slide completely into the slide groove under the action of external force, and after the external force on the slider is removed, the upper part of the slider can extend upward from the slide groove under the push of the spring and block the outer side of the thin-walled edge of the curved plate. At this time, the slider is pressed against the outer side of the thin-walled edge of the curved plate toward the side of the thin-walled edge of the curved plate.

[0008] Furthermore, a clearance groove for the tool to pass through is provided at a position surrounding the arc plate on the top of the bottom plate.

[0009] Furthermore, a feed groove is provided on the bottom plate for the tool to pass through when processing the plastic plate. The feed groove is connected to the air avoidance groove. The tool cuts the plastic plate along the feed groove and enters the air avoidance groove, and then mills the plastic plate back and forth along the air avoidance groove, thereby processing the shape of the arc plate and finally separating the arc plate from the plastic plate.

[0010] Furthermore, a clearance groove for the tool to pass through is provided on the top of the slider. When the slider is pressed into the slide groove, the clearance groove is connected to the avoidance groove.

[0011] Furthermore, the top of the slider is an inclined surface, which slopes downward from the direction close to the thin-walled edge of the curved plate toward the direction away from the thin-walled edge of the curved plate. When the cutter cuts off the portion of the plastic plate directly above the slider, the slider moves upward under the action of the spring and pushes up the cut portion of the plastic plate. Since the top of the slider is inclined, the cut plastic plate slides away along the inclined surface toward the direction away from the thin-walled edge of the curved plate.

[0012] Furthermore, in order to provide sufficient upward force for the slider, the number of the springs is two and they are symmetrically arranged between the bottom of the slider and the bottom of the sliding groove.

[0013] Furthermore, in order to provide stable guidance for the up and down movement of the slider, the auxiliary mechanism also includes a guide groove and a guide rod. The guide groove is vertically arranged directly below the spring and is connected to the slide groove; the guide rod is vertically sleeved in the guide groove, and the upper end of the guide rod is sleeved in the spring and fixedly connected to the bottom of the slider.

[0014] Furthermore, two threaded holes are provided on the base plate, corresponding to each corner of the plastic plate. A bolt is threaded into each threaded hole. The shank of the bolt passes through the plastic plate and then threads into the threaded hole, while the head of the bolt presses the plastic plate firmly against the base plate. Note that the threaded holes and bolts are not provided on the plastic plate that needs to be cut directly above the slider.

[0015] Furthermore, in order to locate the base plate and the square plastic handle on the machine tool operating table, positioning holes with positioning pins are provided at both ends of the base plate, and at least one positioning hole is provided at each end. A positioning pin is provided in each positioning hole and is inserted into the positioning hole and the preset hole in the operating table.

[0016] The utility model provides a bottom plate with a portion that can support the outer side of the thin-walled edge before processing the thin-walled edge, thereby effectively avoiding the occurrence of cracking or breaking of the thin-walled edge when processing the inner side of the thin-walled edge, reducing the scrap rate and greatly increasing the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below with reference to the accompanying drawings.

[0018] Figure 1 is a structural schematic diagram of the curved plate;

[0019] Figure 2 is a schematic structural diagram of a plastic plate used for processing the curved plate;

[0020] Figure 3 This is a schematic structural diagram of the compacting and positioning device for processing curved plates of special vehicles according to the present invention;

[0021] Figure 4 for Figure 3 Cross-sectional view along AA direction;

[0022] Figure 5 for Figure 3 Cross-sectional view along the BB direction;

[0023] Figure 6 This is a pressing and positioning device for processing curved plates of special vehicles described in the utility model;

[0024] As shown in the figure: 1-arc plate, 101-large groove, 102-small groove, 103-thin-wall edge, 104-small hole, 2-bottom plate, 3-positioning hole, 4-threaded hole, 5-allowance hole, 6-slide groove, 7-slider, 8-spring, 9-avoidance groove, 10-feed groove, 11-allowance groove, 12-guide groove, 13-guide rod. DETAILED DESCRIPTION

[0025] The following specific embodiments illustrate the embodiments of the present invention. Those skilled in the art can easily understand the other advantages and effects of the present invention from the contents disclosed in this specification. The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology, and are not used to limit the conditions for the implementation of this utility model. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of this utility model without substantially changing the technical content.

[0027] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances. Example 1

[0028] like Figure 1 The figure shows a curved plate, which is composed of Figure 2 The arc-shaped plate is made from a square plastic plate shown in FIG. 4 . Figure 1 The curved plate 1 shown in the figure is placed horizontally, and its front and rear sides are curved sides with the same bending direction, the left and right sides are straight sides, and the lower surface is flat. The upper surfaces of the four sides of the curved plate 1 are all convex and form a large groove 101 with the same shape as the curved plate 1 between the four convex edges. The thickness of the four convex edges of the curved plate 1 is greater than 7 mm. The right side of the large groove 101 is further recessed toward the right convex edge to form a small groove 102 connected to the large groove 101. The existence of the small groove 102 reduces the thickness of the position where the right convex edge of the curved plate faces the small groove (this position is defined as the thin-walled edge 103) to about 2 mm. Small holes 104 are evenly drilled on the tops of the four convex edges of the curved plate 1.

[0029] like Figure 3-5 As shown, this embodiment provides a clamping and positioning device for processing curved plates of special vehicles to solve the problem that the thin-walled edges of the curved plates are prone to cracking or breaking. The clamping and positioning device for processing curved plates of special vehicles includes a base plate 2 and an auxiliary mechanism.

[0030] The base plate 2 is a rectangular plate that is clamped horizontally to the machine tool operating table to hold the plastic plate in place. To position the base plate 2 and the plastic plate on the machine tool operating table, positioning holes 3 with locating pins are provided at each end of the base plate 2. Two positioning holes 3 are provided at each end of the base plate 2, each containing a positioning pin that engages with a pre-set hole in the operating table. Two threaded holes 4 are provided on the base plate 2, corresponding to each corner of the plastic plate. Each threaded hole 4 is threaded with a bolt. The shank of the bolt passes through the pre-set hole in the plastic plate and then screws into the threaded hole 4, while the head of the bolt presses the plastic plate against the base plate 2. None of the threaded holes 4 and bolts are located on the plastic plate directly above the slider 7, where it needs to be cut. Instead, they are located on the base plate 2 to the left of the thin-walled edge 103 of the curved plate 1. Furthermore, clearance holes 5 are provided on the base plate 2, corresponding one-to-one with the small holes 104 at the top of the four raised edges of the curved plate 1.

[0031] The auxiliary mechanism includes a sliding groove 6 , a slider 7 and a spring 8 .

[0032] The chute 6 is arranged at the top of the bottom plate 2 near the thin-walled edge 103 of the curved plate 1 (arranged on the right side of the thin-walled edge 103 of the curved plate 1), and the left side wall of the chute 6 is aligned with the outer side (right side) of the thin-walled edge 103 of the curved plate 1.

[0033] The slider 7 is disposed within the chute 6 and can slide up and down along the chute 6 (sliding in cooperation with the chute 6). Before machining the large groove 101 and the small groove 102 of the curved plate 1, the plastic sheet in the corresponding area directly above the slider 7 must be cut to facilitate the upward movement of the slider 7. The side of the slider 7 facing the thin-walled edge 103 of the curved plate 1 (the left side) is aligned with the outer side (the right side) of the thin-walled edge 103 of the curved plate 1. The slider 7 can slide completely into the chute 6 under the action of an external force. After the external force on the slider 7 is removed, the upper portion of the slider 7 can extend upward from the chute 6 and block the outer side (the right side) of the thin-walled edge 101 of the curved plate 1. At this time, the side of the slider 7 facing the thin-walled edge 103 of the curved plate 1 (the left side) is in close contact with the outer side (the right side) of the thin-walled edge 103 of the curved plate 1.

[0034] The spring 8 is arranged in the slide groove 6, the upper end of the spring 8 contacts the bottom of the slider 7, and the lower end contacts the bottom of a through hole arranged at the bottom of the slide groove 6 and can be pressed into the through hole under the action of external force.

[0035] like Figure 6 As shown, the steps of processing a curved plate using the clamping and positioning device for processing a curved plate for a special vehicle are as follows:

[0036] (1) The four corners of the plastic plate are pressed against the bottom plate 2 by bolts. At this time, the top of the slider 7 is pressed into the slide groove 6 by the plastic plate, and the spring 8 is compressed to store energy.

[0037] (2) Then place the base plate 2 with the plastic plate installed on the machine tool operating table. At each positioning hole 3, a positioning pin is inserted through the positioning hole 3 and the preset hole on the operating table below it to position the two ends of the base plate 2. Then, a universal clamp (such as a bench vise) is used to clamp the base plate 2 on the machine tool operating table.

[0038] (3) Cut off the lower right corner of the plastic plate along the outer side surface of the thin-walled edge 103 of the arc-shaped plate 1 to be processed, and cut off the plastic plate in the corresponding area directly above the slider 7. After the plastic plate on the top of the slider 7 is cut off, a straight edge is formed on the lower right side of the plastic plate. The outer side of the thin-walled edge 103 of the arc-shaped plate 1 is located on the straight edge (the outer side of the thin-walled edge 103 is a section of the straight edge). At the same time, the spring 8 releases energy to reset and push the slider 7 to move up along the slide groove 6 until the upper half of the slider 7 exceeds the upper surface of the bottom plate 2. At this time, the left side of the protruding part of the slider 7 is close to the outer side (right side) of the thin-walled edge 103 of the arc-shaped plate 1.

[0039] (4) A milling cutter is used to machine a large groove 101 of the arc-shaped plate 1, and then a small groove 102 is further machined toward the thin-walled edge 103 of the arc-shaped plate 1 (the inner side of the thin-walled edge 103 is machined). After the small groove 102 is formed, the machining of the thin-walled edge 103 is completed. Since the outer side (right side) of the thin-walled edge 103 is supported by the slider 7, the thin-walled edge 103 is not easily cracked or broken when machining the inner side (left side) of the thin-walled edge 103.

[0040] (5) Use a drill bit to drill small holes 104 at the top of the four convex edges of the curved plate 1.

[0041] (6) Use a tool to process the outer shape of the arc plate 1 (i.e., process the four convex edges of the arc plate 1), separate the processed arc plate 1 from the plastic plate outside it, and complete the processing of the arc plate. Example 2

[0042] The difference between this embodiment and embodiment 1 is that:

[0043] like Figure 3 As shown, in order to make way for the tool during turning of the curved plate in step (6) and avoid continuous contact between the bottom of the tool and the top of the base plate 2, thereby damaging the tool, a clearance groove 9 is provided at the top of the base plate 2 surrounding the curved plate 1 for the tool to pass through. At the same time, a feed groove 10 is provided on the base plate 2 for the tool to pass through when processing the plastic plate. The feed groove 10 is connected to the clearance groove 9, and the end of the feed groove 10 extends outside the plastic plate. The tool cuts the plastic plate along the feed groove 10 and enters the clearance groove 9, and then mills the plastic plate back and forth along the clearance groove 9, thereby processing the shape of the curved plate 1 and finally separating the curved plate 1 from the plastic plate. A clearance groove 11 is also provided at the top of the slider 7 for the tool to pass through. When the slider 7 is pressed into the slide groove 6, the clearance groove 11 is connected to the clearance groove 9. Example 3

[0044] The difference between this embodiment and embodiment 1 or 2 is that:

[0045] In order to prevent the plastic plate cut off from the upper portion of the slider 7 from sliding leftward to the top of the left plastic plate after being lifted upward by the slider 7 .

[0046] like Figure 5 As shown, the top of the slider 7 is an inclined surface, which slopes downward from the direction close to the thin-walled edge 103 of the curved plate 1 toward the direction away from the thin-walled edge 103 of the curved plate 1 (i.e., it slopes downward from the left side to the right side). After the tool cuts off the plastic sheet in the area directly above the slider 7, the slider 7 moves upward under the action of the spring 8 and pushes the cut portion of the plastic sheet upward. Because the top of the slider 7 is inclined, the cut plastic sheet 7 slides along the inclined surface toward the direction away from the thin-walled edge 101 of the curved plate 1 (to the right), thus not affecting the subsequent processing of the curved plate 1. Example 4

[0047] The difference between this embodiment and any one of Embodiments 1-3 is that:

[0048] In order to provide sufficient upward force for the slider 7 , the number of the springs 8 is two and they are symmetrically arranged between the bottom of the slider 7 and the bottom of the sliding groove 6 . Example 5

[0049] The difference between this embodiment and any one of Embodiments 1-4 is that:

[0050] In order to provide a stable guide for the up and down movement of the slider 7, as shown in FIG. Figure 4 and Figure 5 As shown, the auxiliary mechanism also includes a guide groove 12 and a guide rod 13. The guide groove 12 is vertically arranged directly below the spring 8 and is connected to the slide groove 6; the guide rod 13 is vertically sleeved in the guide groove 12 (the guide groove 12 and the guide rod 13 are slidably matched), and the upper end of the guide rod 13 is sleeved in the spring 8 and fixedly connected to the bottom of the slider 7.

[0051] Other aspects of the present invention that are not described in detail are all conventional technologies known to those skilled in the art.

[0052] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements that are inherent to such process, method, article, or apparatus.

[0053] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A clamping and positioning device for machining curved panels for special vehicles, wherein the curved panels are machined from plastic sheets and have a thin-walled edge. The clamping and positioning device comprises a base plate mounted on a machine tool operating table for clamping and positioning the plastic sheet, and is characterized by: The cam is provided with a plurality of movable members, each of which is provided with a plurality of movable members, and the movable members are provided with a plurality of movable members. The movable members are provided with a plurality of movable members, each of which is provided with a plurality of movable members. The movable members are provided with a plurality of movable members, each of which is provided with a plurality of movable members.

2. The pressing and positioning device for processing curved plates of special vehicles according to claim 1, characterized in that: A clearance groove for the tool to pass through is provided at a position surrounding the arc plate on the top of the bottom plate.

3. The pressing and positioning device for processing curved plates of special vehicles according to claim 2, characterized in that: A tool feed groove is provided on the bottom plate for a tool to pass through when processing the plastic plate, and the tool feed groove is communicated with the air avoidance groove.

4. The pressing and positioning device for processing curved plates of special vehicles according to claim 2, characterized in that: A clearance groove is provided on the top of the slider for the tool to pass through. When the slider is pressed into the slide groove, the clearance groove is connected to the avoidance groove.

5. The pressing and positioning device for processing curved plates of special vehicles according to claim 1, characterized in that: The top of the sliding block is an inclined surface, and the inclined surface is inclined downward from a direction close to the thin-walled edge of the arc-shaped plate toward a direction away from the thin-walled edge of the arc-shaped plate.

6. The pressing and positioning device for processing curved plates of special vehicles according to claim 1, characterized in that: There are two springs, which are symmetrically arranged between the bottom of the slider and the bottom of the sliding groove.

7. The pressing and positioning device for processing curved plates of special vehicles according to claim 1, characterized in that: The auxiliary mechanism also includes a guide groove and a guide rod. The guide groove is vertically arranged directly below the spring and is connected to the slide groove; the guide rod is vertically sleeved in the guide groove, and the upper end of the guide rod is sleeved in the spring and fixedly connected to the bottom of the slider.

8. The pressing and positioning device for processing curved plates of special vehicles according to claim 1, characterized in that: Two threaded holes are respectively provided on the bottom plate corresponding to each corner of the plastic plate. A bolt is threadedly connected in each threaded hole. The rod of the bolt passes through the plastic plate and is threadedly connected in the threaded hole, while the head of the bolt presses the plastic plate to position it on the bottom plate.

9. The pressing and positioning device for processing curved plates of special vehicles according to claim 1, characterized in that: Positioning holes with positioning pins are provided at both ends of the bottom plate.

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