Semicircular workbench casting deformation prevention structure

Abstract

The utility model discloses a deformation prevention structure for a semicircular workbench casting, which is characterized in that a correction amount is preset in an inner cavity of the semicircular workbench casting, and the area covered by the correction amount at least comprises the area close to the end face of the semicircular workbench casting and the area covering the central axis of the middle and close to the central axis. And the area covered by each correction amount is fan-shaped. According to the deformation prevention structure for the semicircular workbench casting, the supplement amount is preset in the inner cavity of the semicircular workbench casting, the supplement mode of the process supplement amount is refined, the casting size precision of the semicircular workbench casting is improved, and it is guaranteed that the thickness of the machined semicircular workbench surface meets the design requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to casting technical field, concretely relates to a semicircular workbench casting deformation prevention structure. BACKGROUND

[0002] For large and heavy machine tool, the workbench is its important component, and the workbench is mostly circular, needs to make rotary motion, and the precision requirement is higher.

[0003] Due to the size of the semicircular workbench casting is larger, the casting will appear bending deformation in the production and solidification forming process, through the bending deformation situation of the workbench of the workshop production (the pouring direction is from the outer periphery to the inside), it is found that for the same semicircular workbench casting, in the equal radius direction, it presents M type deformation, and the specific embodiment is that the semicircular workbench casting two ends and the middle part are protruding, and the deformation degree increases with the increase of the radius. SUMMARY

[0004] The utility model discloses to solve the technical problem that the prior art exists, and provides a semicircular workbench casting deformation prevention structure.

[0005] To achieve the above object, the utility model adopts the technical scheme that:

[0006] A semicircular workbench casting deformation prevention structure, the inner cavity of the semicircular workbench casting is preset with a correction amount, the area covered by the correction amount at least includes the area close to the end face of the semicircular workbench casting, and the area close to the central axis and the central axis in the middle part, and the area covered by the correction amount at each place is a sector.

[0007] The semicircular workbench casting deformation prevention structure can offset the deformation amount of the semicircular workbench casting at both ends and the middle part area, overcome the M-shaped deformation phenomenon, effectively reduce the waste rate of the casting and the subsequent processing difficulty, and ensure the size and precision requirements of the semicircular workbench product.

[0008] The semicircular workbench casting deformation prevention structure can offset the deformation amount of the semicircular workbench casting at both ends and the middle part area, overcome the M-shaped deformation phenomenon, effectively reduce the waste rate of the casting and the subsequent processing difficulty, and ensure the size and precision requirements of the semicircular workbench product.

[0009] Further, the correction amount is arranged in two sectors of one-eighth of a circle near the end face of the semicircular workbench casting.

[0010] Further, the correction amount is arranged in two sectors of one-eighth of a circle on both sides of the central axis of the semicircular workbench casting. Through this division, the area where the correction amount needs to be added can be determined more conveniently.

[0011] Further, the thickness of the correction amount in each coverage area gradually decreases from the outer periphery to the center.

[0012] Further, the thickness of the correction amount is 1-10 mm.

[0013] Further, when the radius of the semicircular workbench casting is less than 1000 mm, the thickness of the correction amount is less than 2 mm; when the radius of the semicircular workbench casting is 1000-2000 mm, the thickness of the correction amount is 2-4 mm; and when the radius of the semicircular workbench assembly increases by 1000 mm, the thickness of the correction amount increases by 2 mm.

[0014] Further, the semicircular workbench casting includes a workbench plane, the back of the workbench plane is provided with a workbench vertical plane on the end side, the back of the workbench plane is provided with a plurality of radial ribs and annular ribs, the radial ribs and the annular ribs separate the back of the workbench plane into a plurality of cavity areas, the back of the workbench plane is provided with the correction amount, and the correction amount falls into a single cavity area or adjacent cavity areas.

[0015] Further, the depth of the cavity area in the same radial direction decreases from the center to the periphery, and the thickness of the correction amount increases from the center to the periphery.

[0016] Further, the correction amount of the middle sector area spans three adjacent cavity areas in the middle.

[0017] Compared with the prior art, the beneficial effects of the utility model are: 1, the semi-circular workbench casting prevents deformation structure through the inner cavity of semi-circular workbench casting and pre-set correction amount, the supplement mode of process correction amount is refined, the casting size precision of semi-circular workbench casting is promoted, and the thickness of semi-circular workbench table top after processing meets the design requirement; 2, the semi-circular workbench casting prevents deformation structure through the correction amount arranged at both ends and the middle region, can offset the deformation amount of semi-circular workbench casting at both ends and the middle region, overcome M-shaped deformation phenomenon, effectively reduce the waste rate and subsequent processing difficulty of casting, ensure the size and precision requirement of semi-circular workbench product; 3, through the pre-set correction amount of the utility model, not only can prevent casting deformation, but also can obviously reduce the additional casting weight caused by the way of increasing correction amount as a whole, and under the condition that the large plane table top can be processed, it is favorable to solve the quality problems such as core support residue after processing of large, super large workbench large plane; 4, for large, super large workbench, with the increase of radius size, the deformation degree of workbench table top increases, the pre-deformation structure of the utility model for the increase of casting precision and the reduction of additional casting weight is more obviously embodied; 5, through the control of the correction amount value of each cavity region in the radial direction, the bottom surface of each cavity is still horizontal. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a fan-shaped area schematic view of setting correction amount in the semi-circular workbench casting prevents deformation structure of the utility model;

[0019] Figure 2 It is a structure schematic view of semi-circular workbench casting of the utility model;

[0020] Figure 3 It is Figure 2 A-A section schematic view in the middle;

[0021] Figure 4 It is Figure 2 B-B section schematic view in the middle;

[0022] In the drawing: 1, semi-circular workbench casting; 101, workbench plane; 102, workbench vertical surface; 103, radial rib plate; 104, ring rib plate; 105, cavity region; 2, correction amount; 3, correction value line. DETAILED DESCRIPTION

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] like Figures 1-4 As shown, a deformation prevention structure for a semi-circular workbench casting is provided. A correction amount 2 is preset in the inner cavity of the semi-circular workbench casting 1. The area covered by the correction amount 2 includes at least the area near the end face of the semi-circular workbench casting 1, as well as the area covering the central axis and the area near the central axis. The area covered by each correction amount 2 is fan-shaped.

[0026] The anti-deformation structure of this semi-circular workbench casting refines the method of adding process correction by pre-setting a correction amount 2 in the inner cavity of the semi-circular workbench casting 1, thereby improving the casting dimensional accuracy of the semi-circular workbench casting and ensuring that the thickness of the semi-circular workbench surface after machining meets the design requirements.

[0027] This anti-deformation structure for the semi-circular worktable casting, by setting the aforementioned compensation amount 2 at both ends and the middle region, can offset the deformation amount of the semi-circular worktable casting at both ends and the middle region, overcome the M-shaped deformation phenomenon, effectively reduce the scrap rate of the casting and the difficulty of subsequent processing, and ensure the size and precision requirements of the semi-circular worktable product.

[0028] For large and heavy-duty machine tools, the complete worktable is a large-diameter circle that needs to rotate. To facilitate casting and improve casting quality, it is usually made in half and then assembled. In this application, the semi-circular worktable casting is also produced in pairs, consisting of two semi-circular parts. By setting up a deformation prevention structure for this semi-circular worktable casting, it can be ensured that the deformation of a pair of semi-circular worktable castings is within the same reasonable range. This ensures that the deformation of the final assembled complete worktable is also within a reasonable range, thereby improving the overall product quality of the worktable.

[0029] The preset correction amount 2 can not only prevent the deformation of the casting, but also avoid excessive increase of the correction amount (or pre-deformation amount) and excessive increase of the overall weight, because compared with the way of increasing the correction amount on the whole of the front surface (that is, the surface of the table) of the semicircular table casting, the way of increasing the correction amount on the whole can obviously reduce the additional casting weight caused by the way of increasing the correction amount on the whole, and the correction amount arranged in the utility model is only about 40% of the latter, and under the condition of ensuring that the large flat table surface can be processed, the quality problems such as the residual core support after processing of the large and super large table large flat surface can be solved.

[0030] The correction amount 2 is arranged in the inner cavity of the semicircular table casting 1, that is, on the back surface (compared with the table surface), and this way can be realized by only appropriately changing the size of the sand core, and is relatively simple. In theory, increasing the pre-deformation amount on the plane of the table surface of the semicircular table casting can also prevent deformation, but this increasing way will increase the casting difficulty, so the correction amount of the inner cavity is increased in the reverse direction in this embodiment to achieve the way that the thickness after final processing meets the requirements.

[0031] Further, the semicircular table casting 1 is divided into eight fan-shaped areas according to one-eighth of a semicircle (one-sixteenth of a circumference), and the correction amount 2 is arranged in two fan-shaped areas of one-eighth of a semicircle close to the end surface of the semicircular table casting 1, and the correction amount 2 is arranged in two fan-shaped areas of one-eighth of a semicircle on both sides of the central axis of the semicircular table casting 1. The division way can be used to conveniently determine the area where the correction amount needs to be increased.

[0032] Further, the thickness of the correction amount 2 in each coverage area gradually decreases from the direction close to the outer periphery to the center, that is, from the radial direction, the required correction amount is less close to the center direction, and this correction way also conforms to the deformation rule of this type of casting.

[0033] Further, the thickness value of the correction amount 2 is 1-10 mm, and the thickness value of the correction amount 2 is adjusted according to the size of the casting and the position of the correction amount, so that the casting weight can be prevented from being excessively increased, the waste of raw materials can be reduced, and the cost can be controlled.

[0034] Specifically, when the radius of the semicircular table casting 1 is less than 1000 mm, the thickness value of the correction amount 2 is less than 2 mm; when the radius of the semicircular table casting 1 is 1000-2000 mm, the thickness value of the correction amount 2 is 2-4 mm, and when the radius of the semicircular table casting 1 is 1000 mm, the average thickness value of the correction amount 2 can be 2 mm; and when the radius of the semicircular table assembly increases by 1000 mm, the thickness value of the correction amount increases by 2 mm.

[0035] For large, super large workbench, with the increase of the radius size, the deformation degree of the workbench table increases, which more obviously reflects the increase of the casting precision and the reduction of the additional casting weight of the pre-deformation structure of the utility model.

[0036] Further, the semicircular workbench casting 1 in the embodiment includes a workbench plane 101, the back of the workbench plane 101 is provided with a workbench vertical plane 102 at the end side, the back of the workbench plane 101 is provided with a plurality of radial rib plates 103 and annular rib plates 104, the radial rib plates 103 and the annular rib plates 104 separate the back of the workbench plane 101 into a plurality of cavity areas 105, the back of the workbench plane 101 is provided with the correction amount 2, the correction amount 2 falls into a single cavity area 105 or adjacent cavity areas 105, that is, the correction amount can be in adjacent cavity areas, and the positions of the radial rib plates and the annular rib plates do not need to increase additional correction amounts.

[0037] Further, as shown in Figure 4 , the depth of the cavity area 105 of the same radius decreases from the center to the circumferential direction, and the thickness of the correction amount 2 increases from the center to the circumferential direction, for example, the correction amount of each cavity area from the center to the circumferential direction increases by 1mm, 2mm, 3mm.

[0038] Further, as shown in Figure 3 , the correction amount 2 of the middle sector area circumferentially spans the three adjacent cavity areas 105 in the middle.

[0039] In the circumferential direction of the semicircular workbench casting, for each cavity in the correction area, the correction amount takes the maximum value of the theoretical circumferential correction value, and for the remaining cavities not in the correction area, the correction amount can not be increased; in the radial direction, the correction amount takes the median value of the theoretical radial correction value of each cavity, as shown in Figure 4 , the correction value line 3 is a theoretical correction amount thickness value line, which is gradually changed, and the formed correction area will be a slope, however, the slope is not required for the inner cavity; through the above-mentioned value taking mode, the correction amount of the cavity is finally determined by the value taking in the two directions, so that the bottom surface of each cavity is still horizontal.

[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A semi-circular table casting deformation prevention structure, characterized by, The inner cavity of the semicircular workbench casting is provided with a correction amount, and the area covered by the correction amount includes at least the area close to the end face of the semicircular workbench casting and the area close to the central axis and the area close to the central axis in the middle part, and the area covered by the correction amount at each position is a sector.

2. The semi-circular table casting deformation prevention structure according to claim 1, characterized by, The correction amount is arranged in two sector areas of one-eighth semicircle close to the end face of the semicircular workbench casting.

3. The semi-circular table casting deformation prevention structure according to claim 1, characterized by, The correction amount is arranged in two sector areas of one-eighth semicircle on both sides of the central axis of the semicircular workbench casting.

4. The semi-circular table casting deformation prevention structure according to claim 1, characterized by, The thickness of the correction amount in each covered area gradually decreases from the direction close to the outer periphery to the center.

5. The semi-circular table casting deformation prevention structure according to claim 1, characterized by, The thickness of the correction amount is 1-10 mm.

6. The semi-circular table casting deformation prevention structure according to claim 1, characterized by, When the radius of the semicircular workbench casting is less than 1000 mm, the thickness of the correction amount is less than 2 mm; when the radius of the semicircular workbench casting is 1000-2000 mm, the thickness of the correction amount is 2-4 mm; and when the radius of the semicircular workbench assembly increases by 1000 mm, the thickness of the correction amount increases by 2 mm.

7. The semi-circular table casting deformation prevention structure according to claim 1, characterized by, The semicircular workbench casting includes a workbench plane, the back of the workbench plane is provided with a workbench vertical plane on the end side, the back of the workbench plane is provided with a plurality of radial ribs and annular ribs, the radial ribs and the annular ribs separate the back of the workbench plane into a plurality of cavity areas, and the back of the workbench plane is provided with the correction amount, which falls into a single cavity area or adjacent cavity areas.

8. The semi-circular table casting deformation prevention structure according to claim 7, characterized by, The depth of the cavity area in the same radial direction decreases from the center to the periphery, and the thickness of the correction amount increases from the center to the periphery.

9. The semi-circular table casting deformation prevention structure according to claim 7, wherein The correction amount of the middle sector area circumferentially spans three adjacent cavity areas in the middle part.

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