Clamping and positioning device for machining front and rear end faces of box-type part

Abstract

The utility model discloses a clamping and positioning device for processing front and rear end faces of a box-type part, which comprises a bottom plate, a vertical clamping and pressing assembly and a transverse clamping and pressing assembly are arranged on the bottom plate, the vertical clamping and pressing assembly correspondingly clamps the upper and lower end faces of the box-type part, and the transverse clamping and pressing assembly correspondingly clamps the left and right end faces of the box-type part; a positioning groove is formed in the bottom of the box-type part, a positioning block is arranged on the bottom plate, and the top of the positioning block is gradually narrowed upwards to be smaller than the positioning groove. An elastic piece is arranged between the positioning block and the bottom plate, and the elastic acting force applied to the positioning block by the elastic piece is upward, so that the positioning block can be upwards ejected to be tightly attached to the positioning groove to position the front and rear end faces of the box-shaped part; the positioning groove is located in the edge of the bottom of the box-type part, and a groove opening of the positioning groove inclines downwards. The side, facing the notch, of the positioning block is gradually narrowed to be smaller than the positioning groove, so that the positioning block can be transversely attached to the positioning groove. The box-type part clamping device can realize reliable clamping of box-type parts.

Description

Technical Field

[0001] The utility model relates to the field of clamping and positioning devices, in particular to a clamping and positioning device used for processing the front and rear end surfaces of box-shaped parts. Background Art

[0002] On a four-axis machining center, when machining two opposite end faces on a box-shaped part and the inner axial hole of a box-shaped part through one clamping, the direction of the clamping force of the tooling is perpendicular to the direction of the part's own gravity and the direction of the axial cutting force, which is an unfavorable factor for the reliability of the tooling and the stability of processing. However, in order to shorten the processing cycle and improve the processing accuracy, as well as to reduce the process steps and the number of clamping times as much as possible, it is necessary to reasonably arrange the tooling positioning and clamping structure to ensure the clamping reliability of the tooling and the stability of processing. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a clamping and positioning device for processing the front and rear end faces of a box-type part, aiming to achieve reliable clamping of the box-type part.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model is a clamping and positioning device for processing the front and rear end faces of a box-type part, comprising a base plate, on which are arranged a vertical clamping assembly and a horizontal clamping assembly, the vertical clamping assembly corresponding to clamping the upper and lower end faces of the box-type part, and the horizontal clamping assembly corresponding to clamping the left and right end faces of the box-type part; a positioning groove is provided at the bottom of the box-type part, and a positioning block is provided on the base plate, and the top of the positioning block gradually narrows upward to be smaller than the positioning groove; an elastic member is provided between the positioning block and the base plate, and the elastic force applied by the elastic member to the positioning block is upward, so that the positioning block can be pushed up to be close to the positioning groove to position the front and rear end faces of the box-type part.

[0005] Furthermore, the positioning groove is located at the bottom edge of the box-shaped part, and the notch of the positioning groove is inclined downward; the positioning block gradually narrows toward one side of the notch to be smaller than the positioning groove, so that the positioning block can be laterally close to the positioning groove.

[0006] Furthermore, a vertical guide hole is provided on the bottom plate; the lower end of the positioning block is connected to a guide rod, and the guide rod and the guide hole are slidably matched so that the positioning block can be lifted and lowered along the guide hole; the elastic member is located in the guide hole, and the upper end of the elastic member is against the lower end of the guide rod.

[0007] Furthermore, the transverse clamping assembly includes a transverse stopper and a transverse pushing mechanism that are relatively arranged, and the transverse pushing mechanism can push the box-type part transversely until it is connected to the transverse stopper; the transverse stopper and the positioning block are respectively located on the left and right sides of the box-type part, and when the positioning block is laterally close to the positioning groove, it cooperates with the transverse stopper to position the left and right end faces of the box-type part.

[0008] Furthermore, the left and right end faces of the box-shaped part are casting faces, and the connecting side of the cross block and the box-shaped part is a tooth surface.

[0009] Furthermore, the horizontal pushing mechanism includes a spring piece installed on the base plate support, and a threaded push rod is arranged in the screw hole on the support. The threaded push rod can push the spring piece forward to fit tightly against the box-shaped part and connect the box-shaped part with the horizontal block.

[0010] Furthermore, the vertical clamping assembly includes a supporting block and a pressing mechanism that are relatively arranged, and the pressing mechanism can press the box-shaped part down onto the supporting block.

[0011] Furthermore, the pressing mechanism includes a vertical pole and a pressing plate, the pressing plate is sleeved on the vertical pole through a perforation, and an adjusting nut is threadedly connected to the vertical pole; when the adjusting nut is screwed down along the vertical pole, it drives the pressing plate to press the box-shaped part down onto the supporting block.

[0012] Furthermore, the upper and lower end surfaces of the box-shaped part are casting surfaces, and the top of the support block is a tooth surface.

[0013] Beneficial effects: The utility model is used for the clamping and positioning device for processing the front and rear end faces of box-type parts. The vertical clamping assembly, the horizontal clamping assembly and the positioning block with a gradually changing shape cooperate with each other, so that the clamping force on the box-type parts is sufficient to overcome the part's own gravity and cutting force, so as to achieve reliable clamping of the box-type parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 A three-dimensional schematic diagram of a box-shaped part being clamped on a clamping and positioning device;

[0015] Attached Figure 2 It is a plan view of a box-shaped part being clamped on a clamping and positioning device;

[0016] Attached Figure 3 It is a plan view of the clamping and positioning device;

[0017] Attached Figure 4 It is a three-dimensional schematic diagram of the clamping and positioning device. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] As attached Figures 1 to 4 The clamping and positioning device for processing the front and rear end surfaces of a box-shaped part comprises a bottom plate 1 and a box-shaped part 2, as shown in the attached Figure 1 As shown in the figure, the box-shaped part 2 has six end faces, namely, up and down, left and right, front and back, and the front and back end faces of the box-shaped part 2 and the axial hole of the inner cavity of the box-shaped part 2 need to be processed.

[0020] The bottom plate 1 is provided with a vertical clamping assembly and a horizontal clamping assembly. The vertical clamping assembly corresponds to the upper and lower end surfaces of the box-shaped part 2, and the horizontal clamping assembly corresponds to the left and right end surfaces of the box-shaped part 2. A positioning groove is provided at the bottom of the box-shaped part 2, and a positioning block 3 is provided on the bottom plate 1. The positioning block 3 corresponds to the positioning groove. Figure 4 As shown in , the top of the positioning block 3 gradually narrows upward to be smaller than the positioning groove, that is, the lower end of the positioning block 3 is thicker and the upper end is thinner, and the thin end of the positioning block 3 is smaller than the positioning groove, so that the thin end of the positioning block 3 can be inserted into the positioning groove, and the thick end of the positioning block 3 is larger than the positioning groove. An elastic member 4 is provided between the positioning block 3 and the bottom plate 1, and the elastic force applied by the elastic member 4 to the positioning block 3 is upward, so that the positioning block 3 can be pushed up to the positioning groove to position the front and rear end surfaces of the box-shaped part 2.

[0021] Due to the gradual shape of the positioning block 3 and the elastic effect of the elastic member 4, the positioning block 3 can be adaptively attached to the groove surface of the positioning groove, thereby ensuring that the front and rear end surfaces of the box-shaped part 2 can be accurately positioned.

[0022] As attached Figure 2 As shown in the figure, the positioning groove is located at the bottom edge of the box-shaped part 2, and the notch of the positioning groove is inclined downward. The positioning block 3 gradually narrows toward one side of the notch to be smaller than the positioning groove, that is, as shown in the attached Figure 4 As shown in the figure, the top of the positioning block 3 gradually narrows upward to be smaller than the positioning groove, so the positioning block 3 is wedge-shaped as a whole. When the positioning block 3 is pushed up in the positioning groove under the action of the elastic member 4, the positioning block 3 can also be laterally close to the positioning groove, so that the positioning block 3 can also position the left and right end faces of the box-type part 2.

[0023] As attached Figure 1 As shown in the figure, the bottom plate 1 is provided with a vertical guide hole 5. The lower end of the positioning block 3 is connected to the guide rod 6, and the guide rod 6 is slidably matched with the guide hole 5, so that the positioning block 3 can be lifted and lowered along the guide hole 5. The elastic member 4 is located in the guide hole 5, and the upper end of the elastic member 4 is against the lower end of the guide rod 6. The elastic member 4 is a telescopic spring, and the elastic member 4 can apply an upward elastic force to the guide rod 6.

[0024] As attached Figure 3 and 4 As shown in , the transverse clamping assembly includes a transverse block 7 and a transverse pushing mechanism that are arranged opposite to each other. The transverse block 7 and the transverse pushing mechanism are respectively located on the left and right sides of the box-shaped part 2. The transverse pushing mechanism can push the box-shaped part 2 transversely to connect with the transverse block 7, thereby clamping the left and right end faces of the box-shaped part 2. The transverse block 7 and the positioning block 3 are respectively located on the left and right sides of the box-shaped part 2. When the positioning block 3 is laterally close to the positioning groove, it cooperates with the transverse block 7 to position the left and right end faces of the box-shaped part 2, and then the transverse pushing mechanism pushes the box-shaped part 2 to clamp the box-shaped part 2. As shown in the attached figure Figure 4As shown in FIG. 1 , there are two pairs of cross blocks 7 and transverse pushing mechanisms, and the positioning block 3 is located between the two pairs of cross blocks 7 and transverse pushing mechanisms.

[0025] The left and right end faces of the box-shaped part 2 are casting faces, and the contact side of the cross block 7 and the box-shaped part 2 is a tooth surface. The tooth surface is used to increase the contact area between the cross block 7 and the box-shaped part 2, improve the reliability of positioning support, and in the clamping state, it is also ensured that there is a sufficiently large friction force in the same direction as the axial cutting force to equivalently replace the clamping force in the same direction as the cutting force.

[0026] A support 8 is provided on the bottom plate 1, and the horizontal push mechanism includes a spring piece 9 installed on the support 8 of the bottom plate 1, as shown in the attached Figure 3 and 4 As shown in the figure, the spring piece 9 is a vertical sheet, and the lower end of the spring piece 9 is connected to the support 8. The support 8 is provided with a transverse screw hole, and a threaded push rod 10 is arranged in the screw hole on the support 8. The threaded push rod 10 can push the spring piece 9 forward to close to the box-shaped part 2, and make the box-shaped part 2 connect with the cross block 7. The use of the spring piece 9 can increase the contact area between the horizontal push mechanism and the box-shaped part 2, and prevent the surface of the box-shaped part 2 from being crushed.

[0027] The vertical clamping assembly includes a supporting block 11 and a pressing mechanism that are arranged opposite to each other. The pressing mechanism can press the box-shaped part 2 down onto the supporting block 11. Figure 4 As shown in FIG. 1 , there are four supporting blocks 11 . When the box-shaped part 2 is placed on the supporting blocks 11 , the four supporting blocks 11 are respectively located at the four corners of the box-shaped part 2 .

[0028] The pressing mechanism includes a vertical rod 12 and a pressing plate 13. The lower end of the vertical rod 12 is mounted on the bottom plate 1. The pressing plate 13 is provided with a through hole. The pressing plate 13 is sleeved on the vertical rod 12 through the through hole. The upper end of the vertical rod 12 has an external thread structure. The vertical rod 12 is threaded with an adjusting nut 14. When the adjusting nut 14 is screwed down along the vertical rod 12, it drives the pressing plate 13 to press the box-shaped part 2 down on the supporting block 11. The lower end of the vertical rod 12 is a columnar part, and a spring is provided between the columnar part and the pressing plate 13. A supporting rod 15 is also provided on the bottom plate 1, and the supporting rod 15 corresponds to one end of the supporting plate 13. The lower surface contour of the pressing plate 13 is adapted to the upper surface contour of the box-shaped part 2, so that the pressing plate 13 can better press the box-shaped part 2.

[0029] The upper and lower end surfaces of the box-shaped part 2 are casting surfaces, and the top of the support block 11 is a tooth surface. The tooth surface design is used to increase the contact area between the support block 11 and the box-shaped part 2, thereby improving the reliability of positioning support.

[0030] The two sides of the base plate 1 are respectively provided with a dividing plate connecting plate 16 and a tailstock connecting plate 17, so that the clamping and positioning device of the utility model can be installed on a four-axis machining center.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A clamping and positioning device for processing the front and rear end surfaces of box-shaped parts, characterized in that: The bottom plate (1) comprises a vertical clamping assembly and a horizontal clamping assembly, wherein the vertical clamping assembly corresponds to the upper and lower end surfaces of the clamping box-shaped part (2), and the horizontal clamping assembly corresponds to the left and right end surfaces of the clamping box-shaped part (2); A positioning groove is provided at the bottom of the box-shaped part (2), and a positioning block (3) is provided on the bottom plate (1). The top of the positioning block (3) is gradually narrowed upward to be smaller than the positioning groove. An elastic member (4) is provided between the positioning block (3) and the bottom plate (1). The elastic force applied by the elastic member (4) to the positioning block (3) is directed upward, so that the positioning block (3) can be pushed up to be close to the positioning groove, so as to position the front and rear end surfaces of the box-shaped part (2).

2. The clamping and positioning device for processing the front and rear end surfaces of box-shaped parts according to claim 1 is characterized in that: The positioning groove is located at the bottom edge of the box-shaped part (2), and the notch of the positioning groove is inclined downward; the positioning block (3) gradually narrows toward one side of the notch to be smaller than the positioning groove, so that the positioning block (3) can be laterally close to the positioning groove.

3. The clamping and positioning device for processing the front and rear end surfaces of box-shaped parts according to claim 2 is characterized in that: The bottom plate (1) is provided with a vertical guide hole (5); the lower end of the positioning block (3) is connected to a guide rod (6), and the guide rod (6) and the guide hole (5) are slidably matched, so that the positioning block (3) can be lifted and lowered along the guide hole (5); the elastic member (4) is located in the guide hole (5), and the upper end of the elastic member (4) is against the lower end of the guide rod (6).

4. The clamping and positioning device for processing the front and rear end surfaces of box-shaped parts according to claim 2 is characterized in that: The transverse clamping assembly comprises a transverse stopper (7) and a transverse pushing mechanism which are arranged opposite to each other. The transverse pushing mechanism can push the box-shaped part (2) transversely until it is in contact with the transverse stopper (7). The transverse stopper (7) and the positioning block (3) are respectively located on the left and right sides of the box-shaped part (2). When the positioning block (3) is laterally close to the positioning groove, it cooperates with the transverse stopper (7) to position the left and right end faces of the box-shaped part (2).

5. The clamping and positioning device for processing the front and rear end surfaces of box-shaped parts according to claim 4 is characterized in that: The left and right end faces of the box-shaped part (2) are casting faces, and the connecting sides of the cross block (7) and the box-shaped part (2) are tooth faces.

6. The clamping and positioning device for processing the front and rear end surfaces of box-shaped parts according to claim 4 is characterized in that: The horizontal push mechanism comprises a spring sheet (9) mounted on a support (8) of a base plate (1), a threaded push rod (10) being arranged in a screw hole on the support (8), and the threaded push rod (10) can push the spring sheet (9) forward to be close to the box-shaped part (2), and make the box-shaped part (2) connect with the horizontal block (7).

7. The clamping and positioning device for processing the front and rear end surfaces of box-shaped parts according to claim 4 is characterized in that: The vertical clamping assembly comprises a supporting block (11) and a pressing mechanism which are arranged opposite to each other, and the pressing mechanism can press the box-shaped part (2) down onto the supporting block (11).

8. The clamping and positioning device for processing the front and rear end surfaces of box-shaped parts according to claim 7 is characterized in that: The pressing mechanism comprises a vertical rod (12) and a pressing plate (13). The pressing plate (13) is sleeved on the vertical rod (12) through a perforation. An adjusting nut (14) is threadedly connected to the vertical rod (12). When the adjusting nut (14) is rotated downward along the vertical rod (12), the pressing plate (13) is driven to press the box-shaped part (2) downward onto the supporting block (11).

9. The clamping and positioning device for processing the front and rear end surfaces of box-shaped parts according to claim 7, characterized in that: The upper and lower end surfaces of the box-shaped part (2) are casting surfaces, and the top of the support block (11) is a tooth surface.

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