Double-reference clamp for CNC (computer numerical control) round corner machining

Abstract

The utility model provides a double-reference clamp for CNC (computer numerical control) round corner machining. The double-reference clamp comprises a base, a front limiting reference baffle, a side baffle, a rear baffle, an upper limiting reference baffle, a rear pressing plate, a mounting bolt, an adjusting bolt, a fastening bolt, a first wedge sliding block and a second wedge sliding block. Compared with the prior art that a vice or a side face clamping tool similar to the vice is directly used for clamping and only one datum plane exists, an arc close to 1 / 4 is difficult to form during fillet machining, and machining steps are prone to occurring, blank clamping and two datum limiting can be completed, and the machining efficiency is improved. When CNC machining equipment is adopted and matched with an inner fillet milling cutter to machine the blank subsequently, the problem that the machining quality is unstable due to inconsistency of supplied materials is solved, it is guaranteed that the machined fillet is close to 1 / 4 of the fillet, machining steps are not prone to occurring, and therefore the machining precision and quality are improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rounded corner machining, in particular to a double reference fixture used for CNC rounded corner machining. Background Art

[0002] At present, for many machined products, the one-step processing method is widely used, but the processing efficiency is usually low, the rework rate is high, and the cost is high. Based on cost and efficiency considerations, the product shape can be cut in place and then the rounding process can be performed. However, during the cutting process, there are errors in the blank clamping and the processing accuracy of the equipment itself, resulting in a certain tolerance between the cut products, which is difficult to be completely consistent. At this time, if the rounding process is performed, it is easy to over-cut and form processing steps. In order to avoid this problem and ensure the processing quality, the clamping accuracy can be further improved through a fixture with a dual reference, thereby improving the processing accuracy and quality. Utility Model Content

[0003] The purpose of the utility model is to provide a double reference fixture for CNC processing of fillets in view of the shortcomings of the above-mentioned background technology, which can limit the two processing surfaces of the fillets, form two references, and ensure that the arc of the processed fillets is closer to the preset value and no processing steps occur.

[0004] In order to achieve the above-mentioned object, the utility model provides a double reference fixture for CNC rounded corner machining, including a base, a front limit reference baffle, a side baffle, a rear baffle, an upper limit reference baffle, a rear pressure plate, a mounting bolt, an adjusting bolt, a fastening bolt, a first oblique wedge slider and a second oblique wedge slider;

[0005] The front limit reference baffle is located at the front side and is fixedly connected to the base by the mounting bolts. The front limit reference baffle is used for the limit reference in the X or Y direction. The side baffles are arranged on the left and right sides of the front limit reference baffle and are fixedly connected to the front limit reference baffle by the mounting bolts. An adjusting screw hole is provided on one side of the side baffle, and the adjusting bolt is arranged in the adjusting screw hole. The rear baffle is arranged on the rear side of the clamp, and the rear baffle is connected to the front limit reference baffle by the fastening bolts. The left and right ends of the upper limit reference baffle are fixedly connected to the side baffles by mounting bolts, and the upper limit reference baffle is used for the limit reference in the Z direction.

[0006] The rear pressing plate is connected to the rear baffle by the fastening bolts, and the rear pressing plate is used to press the blank and the front limit reference baffle tightly together so that the blank is limited in the X or Y direction;

[0007] The first oblique wedge slider is movably connected to the front limit reference baffle, the end surface of the first oblique wedge slider is rotatably connected to the adjusting bolt, the top surface of the first oblique wedge slider is an inclined surface, the bottom surface of the second oblique wedge slider is also an inclined surface and contacts and cooperates with the inclined surface of the first oblique wedge slider, the top surface of the second oblique wedge slider is a plane, and the end surface of the second oblique wedge slider is vertically in contact with the side baffle to slide along the Z direction.

[0008] Furthermore, the rear baffle is connected to the front limit reference baffle by at least two fastening bolts so as to be parallel to the front limit reference baffle.

[0009] Furthermore, the fastening bolt first passes through the rear pressure plate, then passes through the rear baffle plate and is connected to the front limit reference baffle plate.

[0010] Furthermore, a pressing block is arranged on the top of the rear pressing plate, and the pressing block contacts and presses the blank.

[0011] Furthermore, the rear baffle is also provided with an assembly groove, and the rear pressure plate is provided with an assembly block, and the assembly block is plug-fitted with the assembly groove.

[0012] Furthermore, the front limit reference baffle is provided with an L-shaped step surface, and the first inclined wedge sliding block is arranged on a horizontal part of the L-shaped step surface.

[0013] Furthermore, the end surface of the first inclined wedge slider is rotatably connected to the adjusting bolt via an assembly sheet.

[0014] The above solution of the utility model has the following beneficial effects:

[0015] The double reference fixture for CNC rounded corner processing provided by the utility model is compared with the prior art that directly clamps with a vise or a side clamping tool similar to a vise and has only one reference surface, which makes it difficult to form a circular arc close to 1 / 4 of the processed rounded corner and is prone to the problem of processing steps. Through the arrangement of the base, the front limit reference baffle, the side baffle, the rear baffle, the upper limit reference baffle, the rear pressure plate, the first inclined wedge slider and the second inclined wedge slider, the blank clamping and the limiting of the two references can be completed. When the blank is subsequently processed by CNC processing equipment and a matching internal fillet milling cutter, the problem of unstable processing quality caused by the inconsistency of the incoming materials is avoided, and the processed rounded corner is guaranteed to be close to the rounded corner of 1 / 4, and processing steps are not easy to occur, thereby improving the processing accuracy and quality and reducing the production cost.

[0016] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 Another schematic diagram of the overall structure of the utility model;

[0019] Figure 3 It is an exploded view of the overall structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the internal structure of the utility model.

[0021] [Description of Reference Numerals]

[0022] 1-base; 2-front limit reference baffle; 3-side baffle; 4-rear baffle; 5-upper limit reference baffle; 6-rear pressure plate; 7-mounting bolt; 8-adjusting bolt; 9-fastening bolt; 10-first inclined wedge slider; 11-second inclined wedge slider; 12-adjusting screw hole; 13-pressing block; 14-assembly slot; 15-assembly block; 16-assembly sheet. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] 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.

[0025] 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 locking 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 an indirect connection 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.

[0026] like Figure 1-Figure 3 As shown, an embodiment of the utility model provides a double reference fixture for CNC processing of fillets, including a base 1, a front limit reference baffle 2, a side baffle 3, a rear baffle 4, an upper limit reference baffle 5, a rear pressure plate 6, a mounting bolt 7, an adjustment bolt 8, a fastening bolt 9, a first inclined wedge slider 10 and a second inclined wedge slider 11. Among them, the base 1 is located at the bottom of the entire fixture, and is used to support and fix the entire fixture. On the upper surface of the base 1, the front limit reference baffle 2 is located on the front side of the fixture, and the bottom of the front limit reference baffle 2 is fixedly connected to the base 1 by the mounting bolt 7, which plays the role of the X or Y direction limit reference. The side baffle 3 is arranged on the left and right sides of the front limit reference baffle 2, and is fixedly connected to the front limit reference baffle 2 by the mounting bolt 7. Among them, the side baffle 3 on one side is provided with an adjustment screw hole 12, and the adjustment screw hole 12 is used to install the adjustment bolt 8. The rear baffle plate 4 is arranged at the rear side of the fixture, and is connected to the front limit reference baffle plate 2 by fastening bolts 9, and is ensured to be parallel to the front limit reference baffle plate 2 by at least two fastening bolts 9. The upper limit reference baffle plate 5 is located above the fixture, and the left and right ends of the upper limit reference baffle plate 5 are fixedly connected to the side baffle plate 3 by mounting bolts 7, which plays the role of the Z direction limit reference.

[0027] In this embodiment, the rear pressure plate 6 is connected to the rear baffle 4, and the fastening bolt 9 first passes through the rear pressure plate 6, then passes through the rear baffle 4 and is connected to the front limit reference baffle 2. Among them, a pressing block 13 is arranged on the top of the rear pressure plate 6. After the fastening bolt 9 is tightened by the setting of the pressing block 13, the pressing block 13 contacts the blank and presses the blank and the front limit reference baffle 2 tightly to fit, thereby ensuring that the blank is the reference limit in the X or Y direction.

[0028] As a preferred embodiment, in this embodiment, the rear baffle 4 is also provided with an assembly groove 14, and the rear pressure plate 6 is provided with an assembly block 15 and cooperates with the assembly groove 14 to avoid excessive warping of the rear pressure plate 6 when the pressure block 13 of the rear pressure plate 6 is compressed (reaction force).

[0029] In this embodiment, the front limit reference baffle plate 2 is provided with an L-shaped step surface, the first inclined wedge slider 10 is provided on the horizontal part of the L-shaped step surface, and the end surface of the first inclined wedge slider 10 is rotatably connected to the adjusting bolt 8 through the assembly piece 16. Figure 4 As shown, the top surface of the first inclined wedge slider 10 is an inclined surface with a certain inclination angle. The bottom surface of the second inclined wedge slider 11 is also an inclined surface with a certain inclination angle, and the angle of the inclined surface is consistent with the angle of the inclined surface of the first inclined wedge slider 10, and contacts and cooperates with the inclined surface of the first inclined wedge slider 10, so that the first inclined wedge slider 10 generates a component force in the Z direction for the second inclined wedge slider 11 during the movement of the X or Y direction. The top surface of the second inclined wedge slider 11 is a plane, and the two end surfaces are in vertical contact with the side baffle 3, which plays a role in smooth movement in the Z direction.

[0030] When assembling the fixture provided in this embodiment, the front limit reference baffle plate 2 is fixed to the base 1 by the mounting bolts 7, and the side baffle plate 3 is fixed to the front limit reference baffle plate 2 by the mounting bolts 7. The adjusting bolt 8 is passed through the adjusting screw hole 12 of the side baffle plate 3, and connected to the first inclined wedge slider 10 by the assembly sheet 16. The first inclined wedge slider 10 is placed on the L-shaped step surface of the front limit reference baffle plate 2, and the second inclined wedge slider 11 is placed on the inclined surface of the first inclined wedge slider 10. Then, the rear baffle plate 4 is connected to the front limit reference baffle plate 2 by the fastening bolts 9, and the blank is placed on the top surface of the second inclined wedge slider 11. Then, the upper limit reference baffle plate 5 is fixed to the side baffle plate 3 by the mounting bolts 7.

[0031] Push the rear pressure plate 4 forward, and preliminarily tighten the fastening bolt 9, and then tighten the adjusting bolt 8 to move the first inclined wedge slider 10. Due to the interaction of the inclined surfaces, the second inclined wedge slider 11 moves in the Z direction (upward), and the blank placed on the top surface of the second inclined wedge slider 11 is pushed to the lower surface of the upper limit reference baffle 5, forming a reference limit in the Z direction. Then completely tighten the fastening bolt 9, the blank is pushed to the inner surface of the front limit reference baffle 2 and contacts it, forming a reference limit in the X or Y direction. Therefore, the blank clamping and the limit of the two references are completed, and then the blank is processed from the gap between the front limit reference baffle 2 and the upper limit reference baffle 5 by using CNC processing equipment and a matching inner fillet milling cutter (the corresponding positions of the front limit reference baffle 2 and the side baffle 3 are provided with feed grooves for convenient feed), avoiding the problem of unstable processing quality caused by the inconsistency of the incoming materials, ensuring that the processed fillet is close to 1 / 4 of the fillet, and it is not easy to have processing steps.

[0032] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A dual reference fixture for CNC rounding, characterized in that: It includes a base, a front limit reference baffle, a side baffle, a rear baffle, an upper limit reference baffle, a rear pressure plate, a mounting bolt, an adjusting bolt, a fastening bolt, a first oblique wedge slider and a second oblique wedge slider; The front limit reference baffle is located at the front side and is fixedly connected to the base by the mounting bolts. The front limit reference baffle is used for the limit reference in the X or Y direction. The side baffles are arranged on the left and right sides of the front limit reference baffle and are fixedly connected to the front limit reference baffle by the mounting bolts. An adjusting screw hole is provided on one side of the side baffle, and the adjusting bolt is arranged in the adjusting screw hole. The rear baffle is arranged on the rear side of the clamp, and the rear baffle is connected to the front limit reference baffle by the fastening bolts. The left and right ends of the upper limit reference baffle are fixedly connected to the side baffles by mounting bolts, and the upper limit reference baffle is used for the limit reference in the Z direction. The rear pressing plate is connected to the rear baffle by the fastening bolts, and the rear pressing plate is used to press the blank and the front limit reference baffle tightly together so that the blank is limited in the X or Y direction; The first oblique wedge slider is movably connected to the front limit reference baffle, the end surface of the first oblique wedge slider is rotatably connected to the adjusting bolt, the top surface of the first oblique wedge slider is an inclined surface, the bottom surface of the second oblique wedge slider is also an inclined surface and contacts and cooperates with the inclined surface of the first oblique wedge slider, the top surface of the second oblique wedge slider is a plane, and the end surface of the second oblique wedge slider is vertically in contact with the side baffle to slide along the Z direction.

2. A dual reference fixture for CNC rounded corner machining according to claim 1, characterized in that: The rear baffle is connected to the front limit reference baffle through at least two fastening bolts so as to be parallel to the front limit reference baffle.

3. A dual reference fixture for CNC rounded corner machining according to claim 2, characterized in that: The fastening bolt first passes through the rear pressure plate, then passes through the rear baffle plate and is connected to the front limit reference baffle plate.

4. A dual reference fixture for CNC rounded corner machining according to claim 1, characterized in that: A pressing block is arranged on the top of the rear pressing plate, and the pressing block contacts and presses the blank.

5. A dual reference fixture for CNC rounded corner machining according to claim 1, characterized in that: The rear baffle is also provided with an assembly groove, and the rear pressure plate is provided with an assembly block, and the assembly block is plug-fitted with the assembly groove.

6. A dual reference fixture for CNC rounded corner machining according to claim 1, characterized in that: The front limit reference baffle is provided with an L-shaped step surface, and the first inclined wedge sliding block is arranged on the horizontal part of the L-shaped step surface.

7. A dual reference fixture for CNC rounded corner machining according to claim 1, characterized in that: The end surface of the first inclined wedge sliding block is rotatably connected to the adjusting bolt via an assembly sheet.

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