A special fixture for inclined surface grinding of machine frame

Abstract

The application provides a special bevel flat grinding clamp for a machine frame, which is characterized in that: a support block is arranged on the base, the inclination angle of the support bevel on the top end of the support block is designed, and the machine frame to be processed is placed on the support bevel; the angle of the bevel to be processed on the machine frame to be processed is adjusted to be horizontal through the support block and the support bevel, then the pressing plate is placed above the through groove of the machine frame to be processed, the pressing bolt is sequentially threaded through the through hole on the pressing plate, the through groove of the machine frame to be processed and the pressing threaded hole arranged on the support block, and the machine frame to be processed is pressed on the end surface of the support block through the pressing bolt and the pressing plate; at this time, the bevel to be processed on the machine frame to be processed is horizontally arranged, and thus the machine frame bevel can be processed by using a flat grinding machine.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically a beveled surface grinding fixture for machine frames. Background Technology

[0002] like Figure 1 As shown, the workpiece to be processed is a submachine gun receiver frame, which includes: a receiver frame body 101 mounted in a cylindrical tube, a through groove 103 opened in the middle of the receiver frame body, two semi-circular arc plates 104 on both sides of the through groove 103, and the part to be processed is the inclined surface 102 of the receiver frame's magazine loading area. Figure 2 As shown, when the machine frame 101 is placed horizontally, the angle α between the inclined surface 102 to be machined and the horizontal axis of the machine frame 101 is 5°. Existing machining methods use CNC machining centers, but this method is relatively expensive. Furthermore, both the workpiece and the inclined surface in this application are in irregular positions, requiring the design of a dedicated fixture even when using a CNC machining center. To reduce machining costs, technicians have considered using a conventional surface grinder to machine the inclined surface; however, designing a fixture suitable for a surface grinder to ensure machining quality becomes a technical problem that needs to be solved. Summary of the Invention

[0003] To address the lack of suitable tooling fixtures when machining inclined surfaces on a machine frame using a surface grinder, this invention provides a special inclined surface grinding fixture for machine frames, suitable for machining inclined surfaces on machine frames using a surface grinder.

[0004] The structure of this utility model is as follows: a special inclined surface grinding fixture for machine frames, characterized in that it includes: a base, a support block and a clamping structure;

[0005] The bottom surface of the base is flat and is horizontally set on the processing platform;

[0006] The support block is provided with a support slope, and the support block is set on the top surface of the base. The machine frame to be processed is placed on the support slope. Based on the support slope, the machine frame to be processed is set as a horizontal plane.

[0007] The clamping structure includes: a pressure plate and clamping bolts;

[0008] A clamping threaded hole is formed on the support block in a direction perpendicular to the support inclined surface. The size of the clamping threaded hole is adapted to the clamping bolt, and the internal thread of the clamping threaded hole and the external thread of the clamping bolt are mutually meshed and matched.

[0009] The diameter of the clamping bolt is smaller than the width of the through groove on the machine frame to be processed; the pressure plate is cylindrical, and the diameter of the pressure plate is larger than the width of the through groove on the machine frame to be processed; the pressure plate has through holes that are adapted to the clamping bolt.

[0010] Its further features are:

[0011] It also includes: an anti-rotation structure, wherein the anti-rotation structure includes: an anti-rotation rod;

[0012] The anti-rotation rod is disposed on the upper end face of the base; the anti-rotation rod is cylindrical and its diameter is smaller than the width of the through groove on the machine frame to be processed;

[0013] Two anti-rotation rods are provided, and the two anti-rotation rods are arranged along the projection direction of the machine frame on the base, respectively on both sides of the support block;

[0014] The base is simultaneously provided with N sets of the support blocks and the clamping structure; N is a natural number greater than or equal to 1.

[0015] This application provides a special inclined surface grinding fixture for machine frames. It includes a support block on a base, with the inclined angle of the support surface at the top of the support block designed to allow the machine frame to be processed to be placed on the support surface. The angle of the inclined surface on the machine frame is adjusted to a horizontal direction using the support block and the support surface. A pressure plate is then placed above the through slot of the machine frame. A clamping bolt is sequentially passed through the through hole on the pressure plate, the through slot of the machine frame, and the threaded hole on the support block. The clamping bolt and pressure plate then press the machine frame against the upper surface of the support block. At this point, the inclined surface on the machine frame is horizontal, allowing a surface grinder to process the inclined surface of the machine frame. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the machine frame to be processed;

[0017] Figure 2 This is a schematic diagram showing the position and angle of the inclined surface to be processed on the machine frame.

[0018] Figure 3 This is a schematic diagram of the overall structure of the fixture in this application;

[0019] Figure 4 This is a schematic diagram of the structure of the inclined support surface on the fixture;

[0020] Figure 5 This is a structural diagram of the base. Detailed Implementation

[0021] like Figures 3-5 As shown, this application includes a special inclined surface grinding fixture for machine frames, which includes: a base 1, a support block 2 and a clamping structure;

[0022] The bottom surface of base 1 is flat and is horizontally set on the processing platform (not marked in the figure);

[0023] A support ramp 21 is provided on the support block 2, which is located on the top surface of the base 1. The machine frame to be processed is placed on the support ramp 21. Based on the support ramp 21, the machine frame to be processed is set as a horizontal plane. The specific width of the support ramp 21 is adaptively set according to the length of the machine frame to be processed, ensuring that the machine frame to be processed can be stably supported after being placed on the support ramp 21.

[0024] When the machine frame body 101 is placed horizontally, the angle between the inclined surface 102 to be processed and the horizontal axis of the machine frame body 101 is α. For example... Figure 4 As shown, the extension line L' of the support slope 21 makes an angle of -α with the horizontal plane. After the machine frame to be processed is placed on the support slope 21, the axis L of the machine frame to be processed is parallel to the line L', ensuring that the machine slope 102 to be processed is parallel to the horizontal plane.

[0025] The clamping structure includes a pressure plate 3 and a clamping bolt 4. A threaded hole 22 for clamping is formed on the support block 2 in a direction perpendicular to the support inclined surface 21. The size of the threaded hole 22 is adapted to the clamping bolt 4, and the internal thread of the threaded hole 22 and the external thread of the clamping bolt 4 are mutually engaged. The diameter of the clamping bolt 4 is smaller than the width of the through slot on the machine frame to be processed. The pressure plate 3 is cylindrical, and its diameter is larger than the width of the through slot on the machine frame to be processed. A through hole adapted to the clamping bolt 4 is formed on the pressure plate 3.

[0026] During surface grinding, the grinding wheel exerts a lateral force on the surface being processed as it moves back and forth across the grinding frame. To ensure that the grinding frame does not deflect significantly during surface grinding and to improve machining accuracy, this application includes an anti-rotation structure, comprising an anti-rotation rod 5. The anti-rotation rod 5 is located on the upper surface of the base 1; the anti-rotation rod 5 is cylindrical with a diameter smaller than the width of the through slot on the grinding frame; in this embodiment, two anti-rotation rods 5 are provided, positioned along the projection direction of the grinding frame onto the base 1, and respectively on both sides of the support block 2, effectively preventing the grinding frame from rotating around the support block 2 and the clamping bolt 4 as an axis.

[0027] When the machine frame to be processed is placed on the support slope 21, ensure that both anti-rotation rods 5 are inserted into the through slots 103 of the machine frame to be processed. Place the pressure plate 3 above the through slots 103 of the machine frame to be processed, and then insert the clamping bolt 4 through the through hole of the pressure plate 3, through the through slots 103, and install it into the clamping threaded hole 22 at an angle perpendicular to the support slope 21. After the machine frame to be processed is positioned on the support slope 21, the slope of the machine frame can be processed by a surface grinder.

[0028] To improve processing efficiency, this application sets the dimensions of the support block 2 to be able to support multiple machine frames to be processed simultaneously along its length, that is, N sets of support blocks 2 and clamping structures are simultaneously set on the base 1; N is a natural number greater than or equal to 1. Figure 3 In this embodiment, N is set to 3. After the three machine frames to be processed are simultaneously mounted on the support block 2, continuous processing can be achieved using a surface grinder.

[0029] Using the technical solution of this utility model, not only is clamping convenient and positioning reliable, but when used with a surface grinder, it can effectively improve processing efficiency.

Claims

1. A special inclined surface grinding fixture for machine frames, characterized in that, It includes: Base, support block, and clamping structure; The bottom surface of the base is flat and is horizontally set on the processing platform; The support block is provided with a support slope, and the support block is set on the top surface of the base. The machine frame to be processed is placed on the support slope. Based on the aforementioned support slope, the slope to be processed on the machine frame to be added is set as a horizontal plane; The clamping structure includes: a pressure plate and clamping bolts; A clamping threaded hole is formed on the support block in a direction perpendicular to the support inclined surface. The size of the clamping threaded hole is adapted to the clamping bolt, and the internal thread of the clamping threaded hole and the external thread of the clamping bolt are mutually meshed. The diameter of the clamping bolt is smaller than the width of the through groove on the machine frame to be processed; the pressure plate is cylindrical, and the diameter of the pressure plate is larger than the width of the through groove on the machine frame to be processed; the pressure plate has through holes that are adapted to the clamping bolt.

2. The bevel grinding fixture for machine frames according to claim 1, characterized in that: It also includes: an anti-rotation structure, wherein the anti-rotation structure includes: an anti-rotation rod; The anti-rotation rod is disposed on the upper end face of the base; the anti-rotation rod is cylindrical and its diameter is smaller than the width of the through groove on the machine frame to be processed.

3. The bevel grinding fixture for machine frames according to claim 2, characterized in that: Two anti-rotation rods are provided, which are arranged along the projection direction of the machine frame on the base and are respectively arranged on both sides of the support block.

4. The bevel grinding fixture for machine frames according to claim 1, characterized in that: The base is simultaneously provided with N sets of the support blocks and the clamping structure; N is a natural number greater than or equal to 1.

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