Space overturning linear cutting clamp

Abstract

The invention provides a space overturning linear cutting clamp which comprises a V-shaped seat and a pressing plate, one side of the V-shaped seat is connected with a linear cutting machine tool through a second screw, the V-shaped seat comprises an I-shaped integrated structure composed of an upper plate, a lower plate and a vertical plate, a V-shaped groove is formed in the top face of the upper plate, threaded holes are formed in the two sides of the upper plate and the lower plate and in the vertical plate, and the pressing plate is connected with the V-shaped groove. The axial direction of the threaded hole is perpendicular to the direction of the plate surface, the pressing plate is in threaded connection with an upper plate of the V-shaped seat through a first screw, a part to be machined is clamped between the upper plate and the pressing plate to be fixed, the ratio of the height to the length of the V-shaped seat is a fixed value, the pressing plate is strip-shaped, the two sides of the pressing plate are horizontal planes and provided with the threaded hole, and the bottom surface of the middle of the pressing plate is of an isosceles trapezoid concave surface structure. The device is simple in overall structure and convenient and fast to mount and dismount, quick and precise part clamping and alignment can be achieved, the production cycle of parts can be shortened, the production efficiency is greatly improved, and the consistency of the dimensional precision of the parts is effectively guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of wire cutting auxiliary tooling, and in particular relates to a spatial flip wire cutting fixture for a cylindrical workpiece with multiple through holes. Background Art

[0002] It is necessary to open a square hole on a round tube part, such as Figure 3 As shown in the figure, the part is quite special. Four consistent square holes need to be processed by wire cutting in one circle of the part. The part is clamped and fixed by a fixture. After one processing, a pair of through square holes are formed. Then the part and the fixture are rotated 90 degrees as a whole and processed again to form a pair of through square holes; the size of the two square holes is measured by a square hole plug gauge. After measurement, it is found that after the four holes are processed, the size of three of the holes is consistent, and the size of one of the holes is larger than the width of the other three holes. After analysis, the reason for this situation is that after processing the first pair of square holes, the height of the two square holes is inconsistent after the fixture is flipped 90°, resulting in a large deviation. In the existing fixture design technology, only a single V-block is used to clamp and process the circular tubular parts in one direction. When the part needs to be flipped 90°, there is a problem of clamping and fixing, and the height of the part relative to the machine tool base changes. Especially for wire cutting process processing, when the height of the part changes, it is easy to have inconsistent part processing dimensions. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a spatial flip wire cutting fixture, which solves the problem of inconsistent sizes of four square holes after parts are processed.

[0004] The technical solution adopted in the present invention is: a spatial flip wire cutting fixture, including a V-shaped seat and a pressure plate, one side of the V-shaped seat is connected to the wire cutting machine by a second screw, the V-shaped seat includes an I-shaped integrated structure composed of an upper plate, a lower plate and a vertical plate, a V-shaped groove is provided on the top surface of the upper plate, and threaded holes are provided on both sides of the upper plate, the lower plate and the vertical plate, and the axial direction of the threaded hole is perpendicular to the plate surface direction, the pressure plate is threadedly connected to the upper plate of the V-shaped seat by a first screw and fixes the part to be processed between the upper plate and the pressure plate, the height and length ratio of the V-shaped seat is a fixed value, so that it satisfies the distance from the axis of the part to be processed to the bottom surface of the lower plate after clamping is equal to the distance from the axis of the part to be processed to the side wall of the upper plate, the pressure plate is a strip, the two sides are horizontal planes and are provided with threaded holes, and the middle bottom surface is an isosceles trapezoidal concave structure.

[0005] Preferably, the bottom of the V-shaped groove of the V-shaped seat is processed into a rectangular long groove, and the rectangular long groove and the V-shaped groove both pass through the width direction of the upper plate.

[0006] Preferably, the middle concave surface structure and the V-groove surface of the pressure plate are provided with anti-skid and anti-wear pads.

[0007] Preferably, the threaded holes of the upper plate and the lower plate correspond to each other vertically and do not interfere with the threaded holes on the vertical plate in space, that is, the axes of the threaded holes of the upper plate and the lower plate are not coplanar with the axes of the threaded holes on the vertical plate.

[0008] The beneficial effects of the present invention are: 1. The present invention has a compact structure, small size, and convenient installation and disassembly operations; 2. The V-groove is automatically aligned and locked with screws, which shortens the clamping time by more than 50%, and can achieve rapid and accurate part clamping and alignment, shorten the production cycle of parts, and greatly improve production efficiency; 3. The double-sided arc clamping structure effectively suppresses processing vibration, and the square hole size is high in accuracy, which effectively ensures the consistency of part size accuracy and thus ensures product accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of a spatial flip wire cutting fixture.

[0010] Figure 2 It is a schematic diagram of the V-type seat structure.

[0011] Figure 3 This is a schematic diagram of the structure of the parts to be processed.

[0012] Figure numerals: 1-V-shaped seat, 2-pressing plate, 3-first screw, 4-part to be processed, 101-upper plate, 102-V-shaped groove, 103-rectangular long groove, 104-vertical plate, 105-lower plate. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] The principle of the present invention is: by designing the ratio of the structural width and height of the V-shaped seat 1, the axis of the part 4 to be processed and the fixture are turned over 90 degrees to keep the height of the axis of the part 4 to be processed consistent with that before the turnover, thereby avoiding the problem of inconsistent processing dimensions caused by different heights of two wire cuttings. Figure 3As shown, the fixture designed by the present invention is used to clamp a circular tube of unequal diameters. Four square holes are cut evenly on the circumference of the part 4 to be processed by using a wire cutting machine. The method of cutting twice is adopted. A pair of square holes on the opposite sides of the circumference are cut for the first time, and then another square hole on the opposite side of the circumference is cut after the whole is turned 90 degrees. If the height of the part 4 to be processed is different during the two cuttings, that is, there is a height difference, the wire cutting force position will be different. Since the tolerance requirement of the hole of the part 4 to be processed is very small, the change of the wire cutting force position directly affects the processing accuracy of the hole.

[0015] like Figure 1 and Figure 2 As shown, a space flip wire cutting fixture includes a V-shaped seat 1 and a pressing plate 2. The V-shaped seat 1 includes an I-shaped integrated structure composed of an upper plate 101, a lower plate 105 and a vertical plate 104. A V-shaped groove 102 is provided on the top surface of the upper plate 101. The V-shaped groove 102 is located on the center line of the length direction of the upper plate 101. Threaded holes are provided on both sides of the upper plate 101 and the lower plate 105 and on the vertical plate 104. The threaded holes of the upper plate 101 and the lower plate 105 correspond to each other up and down and are aligned with the threads on the vertical plate 104. The holes do not interfere with each other in space, that is, the axes of the threaded holes of the upper plate 101 and the lower plate 105 are not coplanar with the axes of the threaded holes on the vertical plate 104, and the axial direction of the threaded holes is perpendicular to the plate surface direction. The threaded holes on the upper plate 101 and the lower plate 105 are used to connect the first screws 3 to fix the part 4 to be processed and to connect the second screws for the first processing and fixed connection between the fixture and the wire cutting machine; the threaded holes on the vertical plate 104 are used for the second processing and fixed connection between the fixture and the wire cutting machine after the fixture is turned 90 degrees. A pair of first screws 3 connect the lower plate 105, the upper plate 101 and the pressing plate 2 from bottom to top in sequence to stably clamp the part 4 to be processed between the upper plate 101 and the pressing plate 2. One type of second screw is the same as the first screw, connecting the wire cutting machine, the lower plate 105 and the upper plate 101 from bottom to top in sequence, and locking it at the upper part of the upper plate 101 for easy operation; the other type is a short screw that threadedly connects the wire cutting machine and the lower plate 105. The pressing plate 2 is threadedly connected to the upper plate 101 of the V-shaped seat 1 through the first screw 3. The pressing plate 2 is in the shape of a strip, with horizontal surfaces on both sides and threaded holes, and the middle bottom surface is an isosceles trapezoidal concave structure. The middle concave structure of the pressing plate 2 and the groove surface of the V-shaped groove 102 are provided with anti-skid and anti-wear pads. The height and length ratio of the V-shaped seat 1 are fixed values. The height refers to the distance from the upper plate 101 to the lower plate 105 of the V-shaped seat 1, and the length refers to the distance between the two side walls of the upper plate 101 perpendicular to the direction of the V-shaped groove 102, so that it satisfies that the distance from the axis of the part 4 to be processed to the bottom surface of the lower plate 105 after clamping is equal to the distance from the axis of the part 4 to be processed to the side wall of the upper plate 101. The bottom of the V-shaped groove 102 of the V-shaped seat 1 is processed into a rectangular long groove 103, and the rectangular long groove 103 and the V-shaped groove 102 both pass through the width direction of the upper plate 101.

[0016] When in use, first connect the V-shaped seat 1 to the designated processing position of the wire cutting machine through the second screw, then place the part 4 to be processed into the V-shaped groove 102, place the pressure plate 2 on the upper part, and clamp the part 4 to be processed between the upper plate 101 and the pressure plate 2 through the first screw 3, and then start the first wire cutting to process the upper and lower pairs of through holes on the part 4 to be processed. After the processing is completed, remove the second screw, flip the fixture together with the part 4 to be processed 90 degrees as a whole, and connect it to the designated processing position of the wire cutting machine through the threaded hole on the vertical plate 104 through the second screw, and continue to start the second wire cutting to process the upper and lower pairs of through holes on the part 4 to be processed.

[0017] The above are specific embodiments of the present invention and the technical principles used. Any modifications and equivalent changes based on the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A space flip wire cutting fixture, characterized by: It includes a V-shaped seat and a pressure plate, one side of the V-shaped seat is connected to the wire cutting machine by a second screw, the V-shaped seat includes an I-shaped integrated structure composed of an upper plate, a lower plate and a vertical plate, a V-shaped groove is provided on the top surface of the upper plate, and threaded holes are provided on both sides of the upper plate, the lower plate and the vertical plate, and the axial direction of the threaded hole is perpendicular to the plate surface direction, the pressure plate is threadedly connected to the upper plate of the V-shaped seat by a first screw and fixes the part to be processed between the upper plate and the pressure plate, the height and length ratio of the V-shaped seat is a fixed value, so that it satisfies that the distance from the axis of the part to be processed to the bottom surface of the lower plate after clamping is equal to the distance from the axis of the part to be processed to the side wall of the upper plate, the pressure plate is a strip, the two sides are horizontal planes and are provided with threaded holes, and the middle bottom surface is an isosceles trapezoidal concave structure.

2. The space flip wire cutting fixture according to claim 1, characterized in that: The bottom of the V-shaped groove of the V-shaped seat is processed into a rectangular long groove, and the rectangular long groove and the V-shaped groove both penetrate the width direction of the upper plate.

3. The space flip wire cutting fixture according to claim 1, characterized in that: The middle concave surface structure and the V-shaped groove surface of the pressing plate are provided with anti-skid and anti-wear pads.

4. The spatial flip wire cutting fixture according to claim 1, characterized in that: The threaded holes of the upper plate and the lower plate correspond to each other vertically and do not interfere with the threaded holes on the vertical plate in space, that is, the axes of the threaded holes of the upper plate and the lower plate are not coplanar with the axes of the threaded holes on the vertical plate.

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