Precise drilling equipment for engine piston

Abstract

The utility model relates to precise drilling equipment for an engine piston, which comprises a base, a first vertical drill bit, a second vertical drill bit, a first inclined drill bit, a second inclined drill bit and a movable positioning table are arranged on the base, the movable positioning table comprises a pedestal and a linear moving table, the pedestal is fixedly connected with the base, the linear moving table is slidably connected with the pedestal, and the linear moving table is fixedly connected with the base. The sliding direction is the front-back direction; the linear moving table is sequentially provided with a machined part containing base and a V-shaped limiting block from front to back, and the machined part containing base is a U-shaped part composed of a bottom plate and two shoulder plates. A centering limiting block is further fixedly arranged on the V-shaped limiting block, the centering limiting block is arranged in a V-shaped groove of the V-shaped limiting block, the left-right symmetry face of the centering limiting block coincides with the left-right symmetry face of the V-shaped groove, and the centering limiting block is used for being inserted into a pin hole of an engine piston. The technical scheme is high in machining precision.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling equipment, and in particular relates to a precision drilling equipment for an engine piston. Background Art

[0002] When drilling straight and oblique internal cooling channel holes on engine pistons, problems such as incomplete drilling or low machining position accuracy often occur, which directly leads to a high defective rate of engine piston processing.

[0003] This is because there are currently two major problems with drilling positioning: (1) There is a lack of workpiece positioning mechanism, and the judgment of the drilling position usually relies on the operator's naked eye, which is very arbitrary and has large errors; (2) The bottom of the engine piston casting inevitably has appearance defects such as casting air holes, burrs and residual risers. When the engine piston casting is placed on the processing table, the engine piston casting itself is very likely to be skewed, which makes it difficult to avoid the problem of straight holes being drilled crookedly and inclined holes not being drilled through. Utility Model Content

[0004] The technical problem to be solved by the utility model is to make up for the deficiencies of the prior art and provide a precise drilling device for an engine piston.

[0005] To solve the above technical problems, the technical solution of the utility model is:

[0006] A precision drilling device for an engine piston comprises a base, a first vertical drill bit, a second vertical drill bit, a first oblique drill bit and a second oblique drill bit are arranged on the base, a movable positioning platform is also arranged on the base, the movable positioning platform comprises a pedestal and a linear movable platform, the pedestal is fixedly connected to the base, the linear movable platform is slidably connected to the pedestal, the sliding direction is a front-back direction, the sliding of the linear movable platform is driven by a linear movable driving mechanism A, and the linear movable driving mechanism A is fixedly connected to the pedestal; the linear movable platform is provided with a workpiece placement seat and a V-shaped limit block in sequence from front to back, and a V-shaped groove of the V-shaped limit block The opening faces forward, and the workpiece placement seat is a "concave" part composed of a bottom plate and two shoulder plates. The concave part between the two shoulder plates is used to accommodate the casting air holes, burrs and residual risers on the bottom surface of the engine piston; the shoulder plate is used to bear the bottom surface of the engine piston; the V-shaped groove of the V-shaped limit block is used to contact the cylindrical side surface of the engine piston; a centering limit block is also fixedly provided on the V-shaped limit block, the centering limit block is arranged in the V-shaped groove of the V-shaped limit block, and the left and right symmetric surfaces of the centering limit block coincide with the left and right symmetric surfaces of the V-shaped groove, and the centering limit block is used to be inserted into the pin hole of the engine piston;

[0007] The controller matches the corresponding position switches to respectively control the stop position of the linear moving table and the processing strokes of the first vertical drill bit, the second vertical drill bit, the first oblique drill bit and the second oblique drill bit;

[0008] When the linear movable table is located at the first position, the first straight hole and the second straight hole of the engine piston are respectively located at the processing positions of the first vertical drill bit and the second vertical drill bit; when the linear movable table is located at the second position, the first inclined hole and the second inclined hole of the engine piston are respectively located at the processing positions of the first oblique drill bit and the second oblique drill bit.

[0009] Furthermore, the linear motion driving mechanism A comprises a cylinder D, a cylinder body of the cylinder D is fixedly connected to the platform, and a piston rod of the cylinder D is fixedly connected to the linear motion platform.

[0010] Furthermore, it also includes a guide rod, which is fixedly connected to the linear moving platform and slidably connected to the platform through a guide hole.

[0011] Furthermore, it also includes a guide block, which is fixedly arranged on the V-shaped limit block and is used for inserting into the notch on the top of the engine piston.

[0012] Furthermore, it also includes an arc-shaped clamping block, which is arranged in front of the workpiece placement seat. The arc-shaped surface of the arc-shaped clamping block is used to contact the cylindrical side of the engine piston, and jointly clamp the engine piston with the V-shaped limit block in front and behind. The arc-shaped clamping block is slidably connected to the linear motion table through the linear motion drive mechanism B.

[0013] Furthermore, the linear motion driving mechanism B is a cylinder E, a cylinder body of the cylinder E is fixedly connected to the linear motion platform, a connecting block is fixed to the end of the piston rod of the cylinder E, and the arc-shaped clamping block is fixedly connected to the connecting block.

[0014] Furthermore, it also includes a bracket A, a bracket B and a bracket C fixedly arranged on the base, and the bracket A, the bracket B and the bracket C are respectively provided with a linear feeding mechanism A, a linear feeding mechanism B and a linear feeding mechanism C, the first vertical drill bit and the second vertical drill bit are both connected to the feeding part of the linear feeding mechanism A, the first oblique drill bit is connected to the feeding part of the linear feeding mechanism B, and the second oblique drill bit is connected to the feeding part of the linear feeding mechanism C.

[0015] Furthermore, a pair of chip falling inclined plates B are inclinedly provided on the rear portion of the base, and a chip removal hole is formed between the pair of chip falling inclined plates B. The base is also provided with an inclined chip falling inclined plate A, which is used to guide the processing debris to the chip removal hole.

[0016] Furthermore, the centering limit block is in a frustum shape, and a horizontal plane P is processed on the top surface.

[0017] The beneficial effects that can be achieved by the utility model are:

[0018] (1) By setting the workpiece placement seat as a "concave" part composed of a bottom plate and two shoulder plates, the concave portion is used to accommodate the casting air holes, burrs and residual risers on the bottom surface of the engine piston, and the shoulder plate supports the bottom surface of the engine piston, thereby greatly reducing the possibility of the engine piston being skewed when placed on the workpiece placement seat, and effectively solving the problems of straight hole drilling crookedly and inclined hole not being drilled through.

[0019] (2) By setting a V-shaped limit block and a centering limit block, the left and right centering of the engine piston when it is placed on the workpiece placement seat is ensured, thereby better ensuring the processing position accuracy.

[0020] (3) By matching the controller with corresponding position switches, the stop position of the linear movable table and the processing strokes of the first vertical drill bit, the second vertical drill bit, the first oblique drill bit and the second oblique drill bit are respectively controlled, so that the processing is automatically carried out, human intervention is avoided, and the processing accuracy is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a stereoscopic view of an embodiment of the utility model (left front perspective).

[0022] Figure 2 It is a stereoscopic view of an embodiment of the utility model (right rear perspective).

[0023] Figure 3 It is a front view of an embodiment of the utility model.

[0024] Figure 4 It is a left view of an embodiment of the utility model.

[0025] Figure 5 It is a top view of an embodiment of the utility model.

[0026] Figure 6 yes Figure 3 AA section view.

[0027] Figure 7 It is a three-dimensional diagram of the mobile positioning platform in the embodiment of the utility model.

[0028] Figure 8 yes Figure 7 Magnified view of section B.

[0029] Fig. 9 It is a longitudinal cross-sectional view of the straight hole of the engine piston.

[0030] Fig.10 It is a longitudinal cross-sectional view of the oblique hole of the engine piston.

[0031] In the figure: 1-base, 101-chip removal hole, 102-chip falling inclined plate A, 103-chip falling inclined plate B, 2-mobile positioning table, 201-base, 2011-guide hole, 202-cylinder D, 203-guide rod, 204-guide block, 205-centering limit block, 2051-plane P, 206-V-shaped limit block, 207-linear moving table, 208-processing part placement seat, 2081-shoulder plate, 2082-bottom plate, 209-connection Block, 210-arc block, 211-cylinder E, 3-first vertical drill bit, 4-first oblique drill bit, 5-bracket A, 6-bracket B, 7-straight feed mechanism B, 8-straight feed mechanism A, 9-straight feed mechanism C, 10-bracket C, 11-second oblique drill bit, 12-second vertical drill bit, 991-first straight hole, 992-second straight hole, 993-first oblique hole, 994-second oblique hole, 995-pin hole, 996-notch. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] A precision drilling device for an engine piston comprises a base 1, on which a first vertical drill bit 3, a second vertical drill bit 12, a first oblique drill bit 4 and a second oblique drill bit 11 are provided, a bracket A5, a bracket B6 and a bracket C10 are provided on the base 1, a linear feed mechanism A8, a linear feed mechanism B7 and a linear feed mechanism C9 are provided on the brackets A5, B6 and C10 respectively, the first vertical drill bit 3 and the second vertical drill bit 12 are both connected to the feed portion of the linear feed mechanism A8, the first oblique drill bit 4 is connected to the feed portion of the linear feed mechanism B7, and the second oblique drill bit 11 is connected to the feed portion of the linear feed mechanism C9.

[0034] The base 1 is also provided with a mobile positioning platform 2, such as Figure 6 and Figure 7As shown, the mobile positioning platform 2 includes a platform 201 and a linear moving platform 207, the platform 201 is fixedly connected to the base 1, and the linear moving platform 207 is slidably connected to the platform 201, and the sliding direction is the front-back direction. The sliding of the linear moving platform 207 is driven by a linear moving driving mechanism A. The linear moving driving mechanism A includes a cylinder D202, the cylinder body of the cylinder D202 is fixedly connected to the platform 201, and the piston rod of the cylinder D202 is fixedly connected to the linear moving platform 207; and also includes a guide rod 203, the guide rod 203 is fixedly connected to the linear moving platform 207, and the guide rod 203 is slidably connected to the platform 201 through a guide hole 2011. The linear moving table 207 is provided with a workpiece placement seat 208 and a V-shaped stopper 206 from front to back. The V-shaped groove opening of the V-shaped stopper 206 faces forward. The workpiece placement seat 208 is a "concave" part composed of a bottom plate 2082 and two shoulder plates 2081. The concave part between the two shoulder plates 2081 is used to accommodate the casting air holes, burrs and residual risers on the bottom surface of the engine piston; the shoulder plate 2081 is used to support the bottom surface of the engine piston; the V-shaped groove of the V-shaped stopper 206 is used to contact The cylindrical side of the engine piston; the V-shaped stopper 206 is also fixed with a centering stopper 205, which is set in the V-shaped groove of the V-shaped stopper 206, and the left and right symmetric surfaces of the centering stopper 205 coincide with the left and right symmetric surfaces of the V-shaped groove. The centering stopper 205 is used to be inserted into the pin hole 995 of the engine piston; the centering stopper 205 is a frustum-shaped, and in order to avoid over-positioning of the engine piston, a horizontal plane P2051 is processed on the top surface of the centering stopper 205. Figure 8 and Fig.10 As shown, it also includes a guide block 204, which is fixedly arranged on the V-shaped limit block 206 and is used to be inserted into the notch 996 on the top of the engine piston to avoid the problem of placing the engine piston to be processed upside down. It also includes an arc-shaped clamping block 210, which is arranged in front of the workpiece placement seat 208. The arc surface of the arc-shaped clamping block 210 is used to contact the cylindrical side of the engine piston, and the V-shaped limit block 206 clamps the engine piston together in front and behind. The arc-shaped clamping block 210 is slidably connected to the linear moving table 207 through a linear moving drive mechanism B. The linear moving drive mechanism B is a cylinder E211, the cylinder body of the cylinder E211 is fixedly connected to the linear moving table 207, and the piston rod end of the cylinder E211 is fixed with a connecting block 209, and the arc-shaped clamping block 210 is fixedly connected to the connecting block 209.

[0035] The controller matches the corresponding position switch to control the stop position of the linear moving table 207 and the strokes of the linear feeding mechanism A8, the linear feeding mechanism B7 and the linear feeding mechanism C9 (i.e., the processing strokes of the first vertical drill 3 and the second vertical drill 12, the first oblique drill 4 and the second oblique drill 11). Since this belongs to the prior art, it is easy for those skilled in the art to understand and implement it, so it will not be repeated here. The position switch used can be a photoelectric proximity switch or a mechanical switch.

[0036] When the linear movable table 207 is located at the first position, the first straight hole 991 and the second straight hole 992 of the engine piston are respectively located at the processing positions of the first vertical drill bit 3 and the second vertical drill bit 12; when the linear movable table 207 is located at the second position, the first inclined hole 993 and the second inclined hole 994 of the engine piston are respectively located at the processing positions of the first oblique drill bit 4 and the second oblique drill bit 11.

[0037] A pair of chip dropping inclined plates B103 are inclined at the rear of the base 1 , and a chip removal hole 101 is formed between the pair of chip dropping inclined plates B103 . The base 1 is also provided with an inclined chip dropping inclined plate A102 , which is used to guide the processing debris to the chip removal hole 101 .

[0038] Use of this embodiment: When in use, the cylinder E211 is controlled by the controller to be in an extended state, so that the arc-shaped clamping block 210 is away from the V-shaped limit block 206; the notch 996 of the engine piston is manually facing upward and aligned with the guide block 204; the pin hole 995 is aligned with the centering limit block 205, and the smooth outer ring of the bottom surface of the engine piston is placed on the two shoulder plates 2081 of the workpiece placement seat 208, so that the casting air holes, burrs and residual risers on the bottom surface of the engine piston are located in the recessed part of the workpiece placement seat 208; the cylinder E211 is controlled by the controller to be in a retracted state, so that the arc surface of the arc-shaped clamping block 210 and the V-shaped limit block 206 are clamped together with the engine piston in front and back; the linear moving table 207 is controlled to be in the first position, and the first straight hole of the engine piston 991 and the second straight hole 992 are respectively located at the processing positions of the first vertical drill bit 3 and the second vertical drill bit 12; the linear feed mechanism A8 is controlled to make the first vertical drill bit 3 and the second vertical drill bit 12 process the first straight hole 991 and the second straight hole 992; when the linear moving table 207 is controlled to be located at the second position, the first inclined hole 993 and the second inclined hole 994 of the engine piston are respectively located at the processing positions of the first oblique drill bit 4 and the second oblique drill bit 11; the linear feed mechanism B7 and the linear feed mechanism C9 are respectively controlled to make the first oblique drill bit 4 and the second oblique drill bit 11 process the first oblique hole 993 and the second oblique hole 994 respectively; after the processing is completed, the cylinder E211 is controlled to be in an extended state, and the engine piston after drilling is manually taken out.

[0039] In order to ensure that the drill does not fall off, counters can be set for the linear feed mechanism A8, the linear feed mechanism B7 and the linear feed mechanism C9 respectively. When the linear feed mechanism A8 is at the lower limit of the stroke, the corresponding counter count increases by 1, indicating that the first straight hole 991 and the second straight hole 992 are processed at the same time; when the linear feed mechanism B7 is at the lower limit of the stroke, the corresponding counter count increases by 1, indicating that the first inclined hole 993 is processed; when the linear feed mechanism C9 is at the lower limit of the stroke, the corresponding counter count increases by 1, indicating that the second inclined hole 994 is processed.

Claims

1. A precision drilling device for an engine piston, comprising a base (1), on which a first vertical drill bit (3), a second vertical drill bit (12), a first oblique drill bit (4) and a second oblique drill bit (11) are arranged, wherein: A movable positioning platform (2) is also provided on the base (1), and the movable positioning platform (2) comprises a platform (201) and a linear movable platform (207), the platform (201) is fixedly connected to the base (1), and the linear movable platform (207) is slidably connected to the platform (201), and the sliding direction is the front-back direction, and the sliding of the linear movable platform (207) is driven by a linear movable driving mechanism A, and the linear movable driving mechanism A is fixedly connected to the platform (201); the linear movable platform (207) is provided with a workpiece placement seat (208) and a V-shaped limit block (206) in sequence from front to back, the V-shaped groove opening of the V-shaped limit block (206) faces forward, and the workpiece placement seat (208) is composed of a bottom plate (2082). and two shoulder plates (2081), the recessed portion between the two shoulder plates (2081) being used to accommodate casting air holes, burrs and residual risers on the bottom surface of the engine piston; the shoulder plate (2081) being used to bear the bottom surface of the engine piston; the V-shaped groove of the V-shaped stop block (206) being used to contact the cylindrical side surface of the engine piston; a centering stop block (205) being fixedly provided on the V-shaped stop block (206), the centering stop block (205) being arranged in the V-shaped groove of the V-shaped stop block (206), and the left and right symmetric surfaces of the centering stop block (205) being coincident with the left and right symmetric surfaces of the V-shaped groove, and the centering stop block (205) being used to be inserted into the pin hole (995) of the engine piston; The controller matches the corresponding position switches to respectively control the stop position of the linear moving table (207) and the processing strokes of the first vertical drill bit (3), the second vertical drill bit (12), the first oblique drill bit (4) and the second oblique drill bit (11); When the linear moving table (207) is located at the first position, the first straight hole (991) and the second straight hole (992) of the engine piston are located at the processing positions of the first vertical drill bit (3) and the second vertical drill bit (12) respectively; when the linear moving table (207) is located at the second position, the first inclined hole (993) and the second inclined hole (994) of the engine piston are located at the processing positions of the first oblique drill bit (4) and the second oblique drill bit (11) respectively.

2. The precision drilling device for engine piston according to claim 1, characterized in that: The linear motion drive mechanism A comprises a cylinder D (202), a cylinder body of the cylinder D (202) being fixedly connected to a pedestal (201), and a piston rod of the cylinder D (202) being fixedly connected to a linear motion platform (207).

3. The precision drilling device for engine piston according to claim 2, characterized in that: It also includes a guide rod (203), the guide rod (203) is fixedly connected to the linear moving platform (207), and the guide rod (203) is slidably connected to the platform (201) through a guide hole (2011).

4. The precision drilling device for engine piston according to claim 1, characterized in that: It also includes a guide block (204), which is fixedly arranged on the V-shaped limit block (206) and is used for inserting into the notch (996) on the top of the engine piston.

5. The precision drilling device for engine piston according to claim 1, characterized in that: Also includes An arc-shaped clamping block (210) is arranged in front of the workpiece placement seat (208); the arc-shaped surface of the arc-shaped clamping block (210) is used to contact the cylindrical side surface of the engine piston, and the arc-shaped clamping block (210) and the V-shaped limit block (206) are used to clamp the engine piston together in front and behind; the arc-shaped clamping block (210) is slidably connected to the linear motion platform (207) through a linear motion drive mechanism B.

6. The precision drilling device for engine piston according to claim 5, characterized in that: The linear motion drive mechanism B is a cylinder E (211), the cylinder body of the cylinder E (211) is fixedly connected to the linear motion platform (207), a connecting block (209) is fixedly provided at the end of the piston rod of the cylinder E (211), and an arc-shaped clamping block (210) is fixedly connected to the connecting block (209).

7. The precision drilling device for engine piston according to claim 1, characterized in that: The invention also comprises a bracket A (5), a bracket B (6) and a bracket C (10) fixedly arranged on the base (1); the bracket A (5), the bracket B (6) and the bracket C (10) are respectively provided with a linear feed mechanism A (8), a linear feed mechanism B (7) and a linear feed mechanism C (9); the first vertical drill bit (3) and the second vertical drill bit (12) are both connected to the feed part of the linear feed mechanism A (8); the first oblique drill bit (4) is connected to the feed part of the linear feed mechanism B (7); and the second oblique drill bit (11) is connected to the feed part of the linear feed mechanism C (9).

8. The precision drilling device for engine piston according to claim 1, characterized in that: A pair of chip dropping inclined plates B (103) are provided at an inclined position on the rear portion of the base (1), a chip removal hole (101) is formed between the pair of chip dropping inclined plates B (103), and a chip dropping inclined plate A (102) is also provided on the base (1), the chip dropping inclined plate A (102) being used to guide machining debris to the chip removal hole (101).

9. The precision drilling device for engine piston according to claim 1, characterized in that: The centering limit block (205) is in the shape of a frustum, and a horizontal plane P (2051) is processed on the top surface.

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