Clamping device for workpiece

Abstract

The utility model provides a clamping device for a workpiece. The clamping device comprises a main body and a pressing plate, the main body is a cylinder with a groove in the circumference and comprises a first end face and a second end face, the groove extends in the axial direction of the main body, the end, close to the first end face, of the groove is provided with an abutting portion, and a second end deviating from the first end face forms a notch in the second end face. The pressing plate is detachably installed on the second end face through a fastener, and the edge of the pressing plate is suitable for blocking the notch. By means of the arrangement, a plurality of workpieces can be clamped at a time, then the workpieces can be machined at the same time, the machining process of the workpieces is simplified, the machining efficiency is improved, the machining period is shortened, and the machining cost is reduced; in this way, the machining dimensional tolerance of the multiple workpieces located in the same groove can be reduced, and the multiple workpieces are consistent.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a clamping device for a workpiece. Background Art

[0002] The missile cabin power socket bracket is an important mechanical structure. One side of the missile cabin power socket bracket is an arc surface, such as Figure 1 The figure shows the schematic diagram of the structure of the power socket bracket of the missile cabin. At present, the conventional method for processing the arc surface is ball cutter climbing processing, that is, using a vise clamp and a spherical milling cutter to perform milling along the entire arc surface in two-dimensional directions, such as Figure 2 As shown, this type of clamping device can only process workpieces one by one, and the resulting dimensional tolerance and consistency are difficult to guarantee, so the efficiency is low, the cycle is long, and the cost is high. Moreover, this type of clamping device will cause tool sticking, poor chip removal, etc. during the processing, resulting in poor surface finish. Utility Model Content

[0003] Therefore, the utility model provides a clamping device for workpieces to solve the problems of cumbersome process, low processing efficiency, long cycle, high cost and inability to guarantee dimensional tolerance and consistency when processing multiple workpieces using the clamping device in the prior art.

[0004] The utility model provides a clamping device for clamping a workpiece, comprising:

[0005] The main body is a cylinder having a groove on its circumference, the main body comprising a first end face and a second end face, the groove extending in the axial direction of the main body, the end of the groove close to the first end face has an abutment portion, and the second end away from the first end face forms a notch on the second end face;

[0006] A pressing plate is detachably mounted on the second end surface via a fastener, and an edge of the pressing plate is suitable for sealing the gap.

[0007] Optionally, at least two of the grooves are spaced apart along the circumferential direction of the main body.

[0008] Optionally, the groove has a first size in the circumferential direction of the body, a second size in the axial direction of the body, and a third size in the radial direction of the body.

[0009] Optionally, the pressing plate includes: a first pressing plate and a second pressing plate, and the first pressing plate and the second pressing plate are semicircular plate-shaped structures; or, the pressing plate includes a third pressing plate, and the third pressing plate is a circular plate-shaped structure.

[0010] Optionally, at least two openings are formed on the second end surface, and the first pressure plate and the second pressure plate are respectively formed with a first through hole and a second through hole corresponding to at least one of the openings, and at least two fasteners respectively pass through the first through hole or the second through hole to enter the opening; or, a third through hole corresponding to the number and position of the openings is formed on the third pressure plate, and the fasteners pass through the third through hole to enter the opening.

[0011] Optionally, the fastener comprises a head and a threaded rod, the head is suitable for being pressed on the first pressing plate, the second pressing plate and / or the third pressing plate, and the opening is provided with an internal thread matching the external thread of the threaded rod.

[0012] Optionally, the first end surface is suitable for being mounted on a chuck of a lathe.

[0013] The utility model has the following advantages:

[0014] The clamping device provided by the utility model comprises: a main body and a pressing plate. The main body is a cylindrical body with a groove on the circumference, and the main body comprises a first end face and a second end face, the groove extends along the axial direction of the main body, an end of the groove close to the first end face has an abutment portion, and a second end away from the first end face forms a notch on the second end face. The pressing plate is detachably mounted on the second end face by a fastener, and the edge of the pressing plate is suitable for blocking the notch.

[0015] When clamping multiple workpieces, the multiple workpieces can be sequentially loaded into the groove, one of the workpieces abuts against the abutment portion, the edge of one workpiece is located in the notch and is flush with or slightly exceeds the second end face, and then the pressure plate is pressed against the second end face using a fastener, and the pressure plate simultaneously presses the workpiece located in the notch, thereby transferring the pressure to each workpiece, thereby pressing the workpiece in the groove, and then the multiple workpieces can be processed simultaneously. With such a configuration, multiple workpieces can be clamped at one time, and then multiple workpieces can be processed simultaneously, simplifying the processing process for multiple workpieces, improving processing efficiency, shortening processing cycles, and reducing processing costs. Since multiple workpieces are located in the same groove, this can also reduce the processing size tolerances of multiple workpieces located in the same groove, so that multiple workpieces have consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1A schematic diagram of the structure of a part example is shown;

[0018] Figure 2 Shows Figure 1 Side view of the part in the figure;

[0019] Figure 3 A schematic diagram of the structure of an example of a workpiece is shown;

[0020] Figure 4 A schematic structural diagram of a clamping structure of the prior art is shown;

[0021] Figure 5 The schematic diagram of the structure of the clamping device in this embodiment is shown;

[0022] Figure 6 The schematic diagram of the structure of the main body in this embodiment is shown;

[0023] Figure 7 It shows a schematic diagram of the structure of the first pressing plate and the second pressing plate in this embodiment;

[0024] Figure 8 shows a schematic structural diagram of the third pressing plate in this embodiment;

[0025] Fig. 9 A schematic diagram of the structure of the fastener in this embodiment is shown;

[0026] Fig.10 A schematic diagram of the structure of the main body and the machine tool in this embodiment is shown;

[0027] Fig.11 Flow chart of the clamping method in this embodiment.

[0028] Description of reference numerals:

[0029] 10. part; 12. first side; 14. second side; 100. workpiece; 102. first surface; 104. second surface; 210. body; 211. second end face; 212. first end face; 213. circumferential surface; 214. opening; 215. groove; 216. notch; 217. abutment; 230. pressure plate; 231. third pressure plate; 2311. third through hole; 232. first pressure plate; 233. first through hole; 234. second pressure plate; 235. second through hole; 250. fastener; 251. head; 252. threaded rod. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1 and Figure 2 As shown, a structural schematic diagram of a part is provided, which may be a power socket bracket of a missile cabin.

[0035] like Figure 1 and Figure 2 As shown, the shape of the part 10 is a block. The part 10 includes a first side surface 12 and a second side surface 14 opposite to the first side surface 12. The first side surface 12 of the part 10 is an arcuate surface. The radius of curvature R1 of the first side surface 12 of the part 10 can be in the range of 20 mm to 500 mm, for example, 30 mm, 40 mm, 60 mm, 80 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm. The second side surface 14 of the part 10 can be, for example, a plane or a curved surface. Figure 1 and Figure 2As shown, the first side surface 12 of the part 10 has a central axis X, which is the central axis of the arc surface. Figure 2 In FIG. 1 , the second side surface 14 of the part 10 has a first dimension A1 in a direction perpendicular to the central axis X (i.e., in the circumferential direction of the arc surface) and a second dimension A2 in a direction parallel to the central axis X. The part 10 has a third dimension A3 and a fourth dimension A4 between the first side surface 12 and the second side surface 14. Figure 2 As shown, the third dimension A3 is the maximum dimension located at the center between the first side surface 12 and the second side surface 14, and the fourth dimension A4 is the minimum dimension located at the edge between the first side surface 12 and the second side surface 14. The difference between the third dimension A3 and the fourth dimension A4 is the chord height of the arc surface of the first side surface 12.

[0036] Figure 3 A workpiece 100 is shown. The workpiece 100 can be clamped and processed to obtain Figure 1 and Figure 2 Part 10 shown. Figure 3 In FIG. 1 , the arcuate surface to be machined, that is, the first side surface 12 of the part 10 to be machined, is shown by a dotted line. Specifically, the workpiece 100 is in the shape of a cuboid. The workpiece 100 includes a first surface 102 and a second surface 104 opposite to the first surface 102. The first surface 102 of the workpiece 100 corresponds to the first side surface 12 of the part 10, and the second surface 104 of the workpiece 100 corresponds to the second side surface 14 of the part 10. The workpiece 100 has the same shape as the part 10 except for the first surface 102 corresponding to the first side surface 12 of the part 10. Therefore, the second side surface 14 of the workpiece 100 has a first dimension A1 in a direction perpendicular to the central axis X (i.e., in the circumferential direction of the cylindrical surface to be machined) and a second dimension A2 in a direction parallel to the central axis X. The workpiece 100 has a third dimension A3 between the first surface 102 and the second surface 104. Figure 1 and Figure 2 The component 10 shown is obtained by machining the corresponding first surface 102 of the workpiece 100 into an arc-shaped surface with a curvature radius R1.

[0037] Figure 4A clamping structure in the prior art is shown, which uses a vise C as a clamping device to clamp a single workpiece P, and then uses a spherical milling cutter T to perform milling along the corresponding first side of the workpiece in a two-dimensional direction to mill the corresponding first side of the workpiece into a cylindrical surface with a desired radius of curvature (i.e., radius of curvature R1). This processing method can only be processed one piece at a time, and the resulting dimensional tolerance and consistency are not easy to guarantee, so the efficiency is low, the cycle is long, and the cost is high. Moreover, this processing method will cause tool sticking, poor chip removal, etc. during the processing process, resulting in poor surface finish.

[0038] In order to solve the above problems, the utility model provides a clamping device and a clamping method for a workpiece. Figures 5 to 11 The embodiments provide a clamping device and a clamping method for a workpiece in detail.

[0039] like Figure 5 and Figure 6 As shown, the utility model provides a clamping device, including: a main body 210 and a pressing plate 230. The main body 210 is a cylinder with a groove 215 on the circumference. The main body 210 includes a first end face 212 and a second end face 211. The groove 215 can be a rectangular groove with a certain length dimension, width dimension and depth dimension. The groove 215 extends along the axial direction of the main body 210. The end of the groove 215 close to the first end face 212 has an abutment portion 217, and the abutment portion 217 is formed by the main body 210. The second end away from the first end face 212 forms a notch 216 on the second end face 211. The pressing plate 230 is detachably mounted on the second end face 211 by a fastener 250, and the edge of the pressing plate is suitable for blocking the notch 216.

[0040] When clamping multiple workpieces, the multiple workpieces can be sequentially loaded into the groove 215, one of the workpieces abuts against the abutment portion 217, the edge of one workpiece is located in the notch 216 and is flush with or slightly exceeds the second end face 211, and then the fastener 250 is used to press the pressing plate 230 on the second end face 211, and the pressing plate 230 simultaneously presses the workpiece located in the notch 216, thereby transferring the pressure to each workpiece, thereby pressing the workpiece in the groove 215, and then the multiple workpieces can be processed simultaneously. With such a configuration, multiple workpieces can be clamped at one time, and then multiple workpieces can be processed simultaneously, simplifying the processing process for multiple workpieces, improving processing efficiency, shortening processing cycles, and reducing processing costs. Since multiple workpieces are located in the same groove, this can also reduce the processing size tolerances of multiple workpieces located in the same groove, so that multiple workpieces have consistency.

[0041] like Figure 5 and Figure 6As shown, in this embodiment, at least two grooves 215 are arranged at intervals along the circumferential direction of the main body 210, and the number of the grooves 215 can be 2, 3, 4 or more, for example Figure 6 As shown, 10 grooves 215 are arranged at intervals in the circumferential direction of the main body 210, and each groove 215 has the same structure. Therefore, multiple workpieces can be placed in each groove 215 in sequence to improve processing efficiency, and can also reduce the processing size tolerance of multiple workpieces located in the same groove, so that the multiple workpieces are consistent, further improving the ability to process multiple workpieces.

[0042] like Figure 5 and Figure 6 As shown, in this embodiment, the groove 215 has a first dimension B1 in the circumferential direction of the main body 210, and the first dimension B1 matches the first dimension A1 of the workpiece 100, or the first dimension A1 has an interference within a range of 0.1 mm to 0.05 mm relative to the first dimension B1, so that the first workpiece 100 is not easy to escape from the groove 215. Such a configuration allows the opposite side walls of the workpiece 100 to abut against the wall of the groove 215.

[0043] The groove 215 has a second dimension B2 in the axial direction of the main body 210, and the value range of the second dimension B2 is greater than N-1 times the second dimension A2 of the workpiece 100 and less than N times the second dimension A2 of the workpiece 100, where N is a positive integer and N can be 2, 3, 4, 5, 6, 7, 8, 9, 10 or even more, so that N workpieces 100 can be accommodated in one groove 215, and the edge of the workpiece 100 located in the notch 216 exceeds the second end face 211, which facilitates the pressing plate 230 to press the workpiece 100, thereby N workpieces 100 can be processed at the same time.

[0044] For example, the second dimension B2 of the groove 215 can be 0.1mm to 2mm smaller than the second dimension A2 of the workpiece 100 by N times, that is, it can be N times - 0.1mm, N times - 0.2mm, N times - 0.3mm ... N times - 2mm, which can meet the requirements of clamping N workpieces 100, and the pressing plate 230 can be pressed tightly on the edge of the workpiece 100 located at the notch 216. When N is 5, the groove 215 can clamp 5 workpieces. The value range can also be a value other than less than 0.1mm or greater than 2mm, and the specific value can be determined according to the actual size of the workpiece 100.

[0045] The main body 210 has a third dimension B3 in the radial direction, which is smaller than the third dimension A3 of the workpiece 100. When the workpiece 100 is placed in the groove 215, the first surface 102 of the workpiece 100 can protrude from the circumferential surface 213 of the main body 210 to facilitate processing of the workpiece 100. After processing, the third dimension B3 is also smaller than the fourth dimension A4 of the part 10.

[0046] like Figure 7 As shown, in a specific implementation of the present embodiment, the pressing plate 230 includes: a first pressing plate 232 and a second pressing plate 234, and the first pressing plate 232 and the second pressing plate 234 are semicircular plate structures. The outer edges of the first pressing plate 232 and the second pressing plate 234 can correspond to the outer edges of the upper half and the lower half of the second end surface 211, respectively, so that it is convenient to place the workpiece 100 in the grooves 215 on both sides of the main body 210. For example, after placing the workpiece 100 in the groove 215 or multiple grooves 215 on one side of the main body 210, the first pressing plate 232 can be pressed on the corresponding position of the second end surface 211 through the fastener 250. After the workpiece 100 in the groove 215 or multiple grooves 215 is pressed, the workpiece 100 is placed in the groove 215 or multiple grooves 215 on the other side of the main body 210 in the same way, and then the second pressing plate 234 is pressed on the corresponding position of the second end surface 211.

[0047] like Figure 7 As shown, in a specific implementation of the present embodiment, at least two openings 214 are provided on the second end face 211, and the first pressure plate 232 and the second pressure plate 234 are respectively provided with a first through hole 233 and a second through hole 235 corresponding to at least one opening 214, and at least two fasteners 250 respectively pass through the first through hole 233 or the second through hole 235 and enter the openings, thereby pressing the first pressure plate 232 and / or the second pressure plate 234 against the second end face 211.

[0048] like Figure 8 As shown, in another specific implementation of the present embodiment, the pressing plate includes a third pressing plate 231, and the third pressing plate 231 is a circular plate structure. Since there is an interference relationship between the workpiece 100 and the side wall of the groove 215, after all the workpieces 100 are placed, all the workpieces 100 can be pressed by the third pressing plate 231.

[0049] like Figure 8 As shown, in another specific implementation of this embodiment, the third pressing plate 231 is provided with third through holes 2311 corresponding to the number and position of the openings 214 , and the fasteners 250 pass through the third through holes 2311 and enter the openings.

[0050] like Fig. 9As shown, in this embodiment, the fastener 250 includes a head 251 and a threaded rod 252, the head 251 is suitable for being pressed on the first pressing plate 232, the second pressing plate 234 and / or the third pressing plate 231, and the opening 214 is provided with an internal thread that cooperates with the external thread of the threaded rod 252.

[0051] like Fig.10 As shown, in this embodiment, the first end surface 212 is suitable for being installed on a chuck CP of a lathe. The chuck CP may be a four-jaw chuck, and the main body 210 may be fixed by the chuck CP.

[0052] like Fig.11 As shown, the utility model provides a clamping method for a workpiece, which is applied to the clamping device introduced above, and the clamping method includes:

[0053] Multiple workpieces are sequentially loaded into the grooves at the outer edge of the main body, and the two opposite edges of the workpieces are in contact with the two opposite side walls of the grooves in the circumferential direction of the main body. Figure 6 As shown, the recess 215 may accommodate a plurality of workpieces 100 .

[0054] The pressing plate is pressed against the second end surface by means of a fastener, and the end surface of the pressing plate is simultaneously pressed against the side wall of the workpiece at the notch position. Figure 5 and Figure 6 As shown, the pressing plate 230 can press the workpiece 100 located in the notch 216 .

[0055] By using the above method, multiple workpieces can be clamped on the main body 210 to facilitate subsequent processing of the workpieces.

[0056] In this embodiment, the clamping method further includes:

[0057] Multiple workpieces are loaded into multiple grooves one by one. Figure 6 As shown, each recess 215 can accommodate a plurality of workpieces.

[0058] The pressing plate is pressed against the second end surface by a fastener, and the end surface of the pressing plate is pressed against the side wall of the workpiece at multiple notch positions at the same time. Figure 5 and Figure 6 As shown, the pressing plate 230 can simultaneously press a plurality of workpieces located at the notch 216 .

[0059] In this embodiment, the clamping method includes:

[0060] Inserting a plurality of workpieces into the groove from the notch in sequence; or,

[0061] A plurality of workpieces are sequentially loaded into the groove from an opening thereof located in a radial direction of the main body.

[0062] A plurality of workpieces may be placed in the groove 215 in the above two ways.

[0063] The clamping method in this embodiment has been simultaneously described when introducing the clamping device above, and the beneficial effects have also been simultaneously described, so they will not be repeated here.

[0064] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A clamping device for a workpiece, characterized in that: include: The main body (210) is a cylindrical body having a groove (215) on its circumference, the main body (210) comprising a first end face (212) and a second end face (211), the groove (215) extending along the axial direction of the main body (210), the end of the groove (215) close to the first end face (212) having an abutment portion (217), and the second end of the groove (215) facing away from the first end face (212) forming a notch (216) on the second end face (211); A pressing plate (230) is detachably mounted on the second end surface (211) via a fastener (250), and an edge of the pressing plate (230) is suitable for sealing the notch (216).

2. The clamping device according to claim 1, characterized in that: At least two of the grooves (215) are arranged at intervals along the circumferential direction of the main body (210).

3. The clamping device according to claim 1, characterized in that: The groove (215) has a first size in the circumferential direction of the body (210), a second size in the axial direction of the body (210), and a third size in the radial direction of the body (210).

4. The clamping device according to claim 1, characterized in that: The pressing plate (230) includes: a first pressing plate (232) and a second pressing plate (234), wherein the first pressing plate (232) and the second pressing plate (234) are semicircular plate-shaped structures; or, the pressing plate (230) includes a third pressing plate (231), wherein the third pressing plate (231) is a circular plate-shaped structure.

5. The clamping device according to claim 4, characterized in that: At least two openings are formed on the second end surface (211), a first through hole (233) and a second through hole (235) corresponding to at least one of the openings are formed on the first pressing plate (232) and the second pressing plate (234), and at least two fasteners (250) respectively pass through the first through hole (233) or the second through hole (235) to enter the opening; or, The third pressing plate (231) is provided with third through holes (2311) corresponding to the number and positions of the openings, and the fasteners (250) pass through the third through holes (2311) and enter the openings.

6. The clamping device according to claim 5, characterized in that: The fastener (250) includes a head (251) and a threaded rod (252), wherein the head (251) is suitable for being pressed onto the first pressing plate (232), the second pressing plate (234) and / or the third pressing plate (231), and the opening is provided with an internal thread that cooperates with the external thread of the threaded rod (252).

7. The clamping device according to claim 1, characterized in that: The first end surface (212) is suitable for being mounted on a chuck of a lathe.

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