A device for removing burrs from the inner cavity of hard parts

Abstract

The present invention provides a device for removing burrs from the inner cavity of a hard part, which is used for removing burrs from the inner cavity of a hard part under the control of a numerically controlled machine tool. The device comprises a connecting unit, a driving unit and an action unit. The cutting fluid sprayed by the spindle of the numerically controlled machine tool and the high hydraulic pressure are used as a programmable control power source. The driving unit is arranged inside the connecting unit, and the connecting unit is connected to the numerically controlled machine tool. The driving unit can be pushed to move under high hydraulic pressure, and the driving unit drives the action unit to move, so that the action unit contacts the inner cavity of the hard part to complete the burr removal operation. The device is easy to use, improves the burr removal efficiency, ensures the quality stability of the hard part products, and saves labor at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of precision machining, and in particular to a device for removing burrs from the inner cavity of a hard part. Background Art

[0002] At present, with the continuous emergence of new technologies and new materials, product processing is tending towards higher precision and better surface finish. Excellent products are an important guarantee for enterprises to increase product added value and competitiveness.

[0003] Many aviation and semiconductor machines require material hardening (heat treatment) before finishing. In this case, after finishing, cutting burrs and flanging will inevitably appear inside the part cavity. The burrs and flanging inside the part cavity cannot be automatically removed on the machine. Manual removal of these burrs and flanging can easily damage the product, affecting product precision and quality stability, and the removal speed is slow, affecting the processing efficiency of the parts. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that burrs and flanges in the inner cavity of hard parts cannot be automatically removed on a machine, manual removal affects product precision and quality stability, and the removal speed is slow, and a device for removing burrs in the inner cavity of hard parts is proposed.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a device for removing burrs from the inner cavity of a hard part, which is used to remove burrs from the inner cavity of a hard part under the control of a numerically controlled machine tool (CNC). The device includes a connecting unit, a driving unit and an action unit. The connecting unit is connected to a tool handle of the CNC machine tool, the driving unit is arranged inside the connecting unit, and the action unit is arranged at one end of the connecting unit away from the tool handle of the CNC machine tool. The driving unit moves under the impetus of the cutting fluid sprayed by the spindle of the CNC machine tool that flows into the inside of the connecting unit, and the action unit contacts the inner cavity of the hard part to remove burrs under the drive of the driving unit.

[0006] Preferably, the connecting unit includes a connecting rod, a liquid flow hole is provided in the middle of the connecting rod, the liquid flow hole passes through the connecting rod, a first groove and a second groove are provided on the side wall of the end of the connecting rod away from the CNC machine tool handle, the first groove and the second groove are arranged opposite to each other, the first groove and the second groove are both connected to the liquid flow hole, the groove depth of the first groove along the axial direction of the connecting rod is smaller than the groove depth of the second groove along the axial direction of the connecting rod, the driving unit is arranged in the liquid flow hole, and the end of the action unit close to the driving unit is arranged at a position corresponding to the second groove in the connecting rod.

[0007] Further, the driving unit includes a driving member, a first connecting member, a first elastic member, a second connecting member and a second elastic member, the first connecting member is fixed on the inner wall of the liquid flow hole, one end of the first elastic member is connected to the first connecting member, the other end of the first elastic member is connected to the driving member, the driving member is movably arranged in the liquid flow hole along the axial direction of the liquid flow hole, a accommodating groove is provided on the side wall of the driving member close to the second groove, the second connecting member is fixed on the groove wall of the accommodating groove, one end of the second elastic member is connected to the second connecting member, and the other end of the second elastic member is connected to the action unit.

[0008] Furthermore, the action unit includes an action piece and a guide piece, an end of the action piece close to the driving piece is arranged at a position corresponding to the second groove in the connecting rod, an end of the action piece close to the driving piece is provided with a contact slope facing the first groove, an end of the contact slope close to the first groove is located in the first groove, a first distance exists between the end of the contact slope close to the first groove and the groove bottom surface of the first groove, a connecting protrusion is provided at the end of the contact slope close to the second groove, the connecting protrusion is connected to the second elastic piece, the connecting protrusion contacts the driving piece, the side wall of the action piece close to the first groove is located in the first groove, a guide groove is provided in the middle position of the action piece, one end of the guide piece is fixed on the inner wall on one side of the liquid flow hole, and the other end of the guide piece is fixed on the inner wall on the other side of the liquid flow hole after passing through the guide groove.

[0009] Furthermore, the action unit also includes a fixed rotating part, a first clamping part and a second clamping part, the first clamping part and the second clamping part are respectively located on both sides of the action part, the groove walls of the first groove and the second groove are both fitted with the first clamping part, the groove walls of the first groove and the second groove are both fitted with the second clamping part, the side wall of the first clamping part close to the first groove is located in the first groove, and the side wall of the second clamping part close to the first groove is located in the first groove, a rotating hole is provided in the middle of the action part, a first connecting hole is provided at a position corresponding to the rotating hole on the first clamping part, a second connecting hole is provided at a position corresponding to the rotating hole on the second clamping part, and a first fixing hole and a second fixing hole are provided at a position corresponding to the rotating hole on the side wall of the connecting rod, and the fixed rotating part passes through the first fixing hole, the first connecting hole, the rotating hole, the second connecting hole, and the second fixing hole in sequence to connect the first clamping part, the action part, the second clamping part and the connecting rod.

[0010] Furthermore, the end surface of the first clamping member away from the driving member and the end surface of the second clamping member away from the driving member are both coplanar with the end surface of the connecting rod close to the actuating member; the guide groove has an arc-shaped structure, and the central axis of the guide groove is coaxially arranged with the central axis of the rotating hole.

[0011] Furthermore, the thickness of the side wall of the actuating member close to the first groove is smaller than the thickness of the side wall of the actuating member close to the second groove; the liquid flow hole includes a first part, a second part and a third part in sequence from an end away from the first groove to an end close to the first groove, the first part, the second part and the third part are connected in sequence, the inner diameter of the first part is smaller than the inner diameter of the second part, the inner diameter of the second part is smaller than the inner diameter of the third part, the first groove and the second groove are both connected to the third part, the height of the third part along the axial direction of the connecting rod is greater than the groove depth of the second groove along the axial direction of the connecting rod, the first connecting member is fixed on the inner wall of the second part, and the driving member is movably arranged in the third part.

[0012] Furthermore, a pressure relief port is provided at one end of the driving member close to the first elastic member, and the pressure relief port is communicated with the accommodating groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the CNC machine tool spindle is used to spray cutting fluid with high hydraulic pressure as a programmable control power source, and the driving unit is arranged inside the connecting unit, and the connecting unit is connected to the CNC machine tool. The driving unit can be pushed to move under high hydraulic pressure, and the driving unit then drives the action unit to move, so that the action unit contacts the inner cavity of the hard part to complete the burr removal operation. It is easy to use, improves the burr removal efficiency, ensures the quality stability of hard part products, and saves labor at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic structural diagram of a device for removing burrs from the inner cavity of a hard part according to an embodiment of the present invention.

[0015] Figure 2 for Figure 1 Schematic diagram of the top view structure.

[0016] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0017] Figure 4 Schematic diagram of the structure of a driving member according to an embodiment of the present invention.

[0018] Figure 5 Schematic diagram of the structure of an action member according to an embodiment of the present invention.

[0019] Figure 6 The present invention is a schematic diagram of the application structure of a device for removing burrs from the inner cavity of a hard part according to an embodiment of the present invention.

[0020] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure.

[0021] Figure 8The present invention is a schematic diagram of another application structure of a hard part inner cavity burr removal device according to an embodiment of the present invention.

[0022] Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure. DETAILED DESCRIPTION

[0023] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0024] Please refer to Figures 1 to 3 The present invention discloses a device for removing burrs from the inner cavity of a hard part, which is used for removing burrs from the inner cavity of a hard part under the control of a numerical control machine tool (CNC). The device comprises a connecting unit 1, a driving unit 2 and an action unit 3. The connecting unit 1 is connected to a tool handle of a numerical control machine tool (not shown in the figure), and the tool handle of the numerical control machine tool is installed on the spindle of the numerical control machine tool. The driving unit 2 is arranged inside the connecting unit 1, and the action unit 3 is arranged at one end of the connecting unit 1 away from the tool handle of the numerical control machine tool. The driving unit 2 moves under the impetus of the cutting fluid sprayed by the spindle of the numerical control machine tool flowing into the connecting unit 1, and the action unit 3 contacts the inner cavity of the hard part under the drive of the driving unit 2 to remove the burrs.

[0025] The device for removing burrs from the inner cavity of a hard part utilizes a CNC machine tool spindle that sprays cutting fluid with a high hydraulic pressure as a programmable control power source. The drive unit 2 is arranged inside a connecting unit 1, and the connecting unit 1 is connected to the CNC machine tool. The drive unit 2 can be pushed to move under high hydraulic pressure, and the drive unit 2 then drives the action unit 3 to move, so that the action unit 3 contacts the inner cavity of the hard part to complete the burr removal operation. The device is easy to use, improves the burr removal efficiency, ensures the quality stability of hard part products, and saves labor.

[0026] Please refer to Figure 1 and Figure 3The connecting unit 1 includes a connecting rod 11, a liquid flow hole 111 is provided in the middle of the connecting rod 11, and the liquid flow hole 111 passes through the connecting rod 11. A first groove 112 and a second groove 113 are provided on the side wall of the end of the connecting rod 11 away from the CNC machine tool handle. The first groove 112 and the second groove 113 are arranged opposite to each other. The first groove 112 and the second groove 113 are both connected to the liquid flow hole 111. The groove depth of the first groove 112 along the axial direction of the connecting rod 11 is less than the groove depth of the second groove 113 along the axial direction of the connecting rod 11. The driving unit 2 is arranged in the liquid flow hole 11, and the end of the action unit 3 close to the driving unit 2 is arranged in the connecting rod 11 at a position corresponding to the second groove 113. The cutting fluid sprayed by the CNC machine tool spindle flows into the liquid flow hole 111 to push the driving unit 2 to move. The driving unit 2 drives the action unit 3 to move and contact the inner cavity of the hard part. The cutting fluid flows to the action unit 3 through the gap between the driving unit 2 and the liquid flow hole 111, which can play a role of lubrication and cooling, thereby ensuring the service life of the action unit 3.

[0027] Please refer to Figure 3 and Figure 4 The driving unit 2 includes a driving member 21, a first connecting member 22, a first elastic member 23, a second connecting member 24 and a second elastic member 25. The first connecting member 22 is fixed to the inner wall of the liquid flow hole 111. One end of the first elastic member 23 is connected to the first connecting member 23, and the other end of the first elastic member 23 is connected to the driving member 21. The driving member 21 is axially movable in the liquid flow hole 111. The side wall of the driving member 21 close to the second groove 113 is provided with a receiving groove 211. The second connecting member 24 is fixed to the groove wall of the receiving groove 211. The second elastic member 23 is connected to the first connecting member 23 and the other end of the first elastic member 23 is connected to the driving member 21. One end of the elastic member 25 is connected to the second connecting member 24, and the other end of the second elastic member 25 is connected to the action unit 3. The cutting fluid sprayed by the CNC machine tool spindle flows into the liquid flow hole 111, pushing the driving member 21 to move axially along the liquid flow hole 111. The first elastic member 23 is in a stretched state, and the driving member 21 drives the action unit 3 to move and contact the inner cavity of the hard part. The second elastic member 25 is in a stretched state. After the burr removal operation is completed, the CNC machine tool spindle stops spraying the cutting fluid, the second elastic member 25 drives the action unit 3 to reset, and the first elastic member 23 drives the driving member 21 to reset.

[0028] Preferably, the first elastic member 23 and the second elastic member 25 are both tension springs.

[0029] Preferably, please refer to Figure 3 and Figure 4 A fixing groove 212 is provided at one end of the driving member 21 close to the first elastic member 23 , and a connecting member 26 is fixed in the fixing groove 212 . The connecting member 26 is connected to the first elastic member 23 , thereby realizing the connection between the driving member 21 and the first elastic member 23 .

[0030] Preferably, see Figure 4A first inclined surface 2111 is provided at one end of the accommodating groove 211 close to the action unit 3, and the distance from the first inclined surface 2111 to the inner wall of the liquid flow hole 111 close to the action unit 3 gradually decreases from the end far away from the action unit 3 to the end close to the action unit 3. The minimum distance from the first inclined surface 2111 to the inner wall of the liquid flow hole 111 close to the action unit 3 is less than the outer diameter of the second elastic member 25, so that the second elastic member 25 can be maintained between the accommodating groove 211 and the liquid flow hole 111 in the initial state to prevent the second elastic member 25 from being affected by its own gravity.

[0031] Preferably, a pressure relief port 213 is provided at one end of the driving member 21 close to the first elastic member 23, and the pressure relief port 213 is connected to the accommodating groove 211 to ensure that the hydraulic pressure in the liquid flow hole 111 is within a safe range during the process of continuous spraying of cutting fluid and burr removal of the CNC machine tool spindle, while facilitating the cutting fluid to flow to the action unit 3 to play a lubricating and cooling role.

[0032] In actual use, there is a clearance fit between the driving member 21 and the liquid flow hole 111 , and the cutting fluid can flow from the gap between the driving member 21 and the liquid flow hole 111 to the action unit 3 to play a role in lubrication and cooling.

[0033] Please refer to Figure 3 , Figure 5 , Figure 7 and Fig. 9 The action unit 3 includes an action piece 31 and a guide piece 32. The end of the action piece 31 close to the driving piece 21 is arranged in the connecting rod 11 at a position corresponding to the second groove 113. The end of the action piece 31 close to the driving piece 21 is provided with a contact inclined surface 311 facing the first groove 112. The end of the contact inclined surface 311 close to the first groove 112 is located in the first groove 112. There is a first distance between the end of the contact inclined surface 311 close to the first groove 112 and the groove bottom surface of the first groove 112, so as to ensure that the action piece 31 has a movement margin and can move in the action. The driving member 21 moves, and a connecting protrusion 3111 is provided at one end of the contact inclined surface 311 close to the second groove 113. The connecting protrusion 3111 is connected to the second elastic member 25. The connecting protrusion 3111 contacts the driving member 21. The side wall of the actuating member 31 close to the first groove 112 is located in the first groove 112. A guide groove 312 is provided in the middle position of the actuating member 31. One end of the guide member 32 is fixed on the inner wall of one side of the liquid flow hole 111, and the other end of the guide member 32 passes through the guide groove 312 and is fixed on the inner wall of the other side of the liquid flow hole 111.

[0034] The cutting fluid sprayed by the spindle of the CNC machine tool flows into the liquid flow hole 111, pushing the driving member 21 to move axially along the liquid flow hole 111, and the driving member 21 successively contacts the connecting protrusion 3111 and the contact inclined surface 311, so that the actuating member 31 moves along the guide groove 312 under the action of the guide member 32, and the end of the actuating member 31 away from the driving member 21 slides outward from the first groove 112. When the driving member 21 and the contact inclined surface 311 fit each other, the end of the actuating member 31 away from the driving member 21 slides out completely, and can contact the inner cavity of the hard part to perform burr removal operations.

[0035] In order to improve the stability of the operating part 31 and ensure the burr removal effect of the inner cavity of the hard parts, please refer to Figure 1 , Figure 3 and Figure 5 The action unit 3 further includes a fixed rotating member 33, a first clamping member 34 and a second clamping member 35. The first clamping member 34 and the second clamping member 35 are respectively located on both sides of the action member 31 to clamp the action member 31 between the first clamping member 34 and the second clamping member 35. The groove walls of the first groove 112 and the second groove 113 are both fitted with the first clamping member 34. The groove walls of the first groove 112 and the second groove 113 are both fitted with the second clamping member 35, so that the first clamping member 34, the action member 31, and the second clamping member 35 are clamped and fixed by the first groove 112 and the second groove 113. The side wall of the first clamping member 34 close to the first groove 112 is located in the first groove 112, and the side wall of the second clamping member 35 close to the first groove 112 is located in the first groove 112. In order to avoid affecting the contact between the actuating member 31 and the inner cavity of the hard part, a rotating hole 313 is provided in the middle of the actuating member 31, a first connecting hole (not shown in the figure) is provided at a position corresponding to the rotating hole 313 on the first clamping member 34, a second connecting hole (not shown in the figure) is provided at a position corresponding to the rotating hole 313 on the second clamping member 35, a first fixing hole 114 and a second fixing hole (not shown in the figure) are provided at a position corresponding to the rotating hole 313 on the side wall of the connecting rod 11, the first fixing hole 114 and the second fixing hole (not shown in the figure) are provided on the side wall of the connecting rod 11, the first connecting hole, the rotating hole 313, the second connecting hole and the second fixing hole are sequentially passed through the first fixing hole 114, the first connecting hole, the rotating hole 313, the second connecting hole and the second fixing hole to connect the first clamping member 34, the actuating member 31 and the second clamping member 35 to the connecting rod 11, and the actuating member 31 rotates around the fixed rotating member 33 driven by the driving member 21.

[0036] Preferably, the guide groove 312 is in an arc shape, and the central axis of the guide groove 312 is coaxially arranged with the central axis of the rotating hole 313, so that the rotation of the actuating member 31 around the fixed rotating member 33 and the movement of the actuating member 31 along the guide groove 312 can be performed simultaneously.

[0037] Preferably, the end surface of the first clamping member 34 away from the driving member 21 and the end surface of the second clamping member 35 away from the driving member 21 are both coplanar with the end surface of the connecting rod 11 close to the actuating member 31, so as to ensure the stability of the actuating member 31 while making the axial length of the device along the connecting rod 11 as small as possible.

[0038] In order to make the action member 31 easily slide out of the first groove 112 under the drive of the driving member 21, please refer to Figure 3 and Figure 5 The thickness d1 of the side wall of the actuating member 31 close to the first groove 112 is smaller than the thickness d2 of the side wall of the actuating member 31 close to the second groove 113. Since the thickness of the side wall of the actuating member 31 close to the first groove 112 is smaller, the actuating member 31 can easily slide outward from the first groove 112, thereby contacting the inner cavity of the hard part.

[0039] In actual use, the action member 31 may be a cutter body, and the cutting fluid flows out from the gap between the driving member 21 and the liquid flow hole 111 and the pressure relief port 213 to lubricate and cool the cutter body, thereby ensuring the service life of the cutter body.

[0040] In order to form a higher hydraulic pressure in the liquid flow hole 111 when the CNC machine tool spindle sprays the cutting fluid, please refer to Figure 3 The liquid flow hole 111 includes a first part 1111, a second part 1112 and a third part 1113 from an end away from the first groove 112 to an end close to the first groove 112. The first part 1111, the second part 1112 and the third part 1113 are connected in sequence. The inner diameter of the first part 1111 is smaller than the inner diameter of the second part 1112. The inner diameter of the second part 1112 is smaller than the inner diameter of the third part 1113. The first groove 112 and the second groove 113 are both connected to the third part 1113. The height of the third part 1113 along the axial direction of the connecting rod 11 is greater than the groove depth of the second groove 113 along the axial direction of the connecting rod 11. The first connecting member 22 is fixed on the inner wall of the second part 1112, and the driving member 21 is movably arranged in the third part 1113.

[0041] Please refer to Figure 6 and Figure 7 , Figure 8 and Fig. 9 , Figure 6 and Figure 7 The structure diagram of the hard part inner cavity burr removal device 100 used for removing burrs on the inner cavity back side of a hard part 200 is shown in FIG. Figure 8 and Fig. 9The structure diagram of the hard part inner cavity deburring device 100 used for deburring the front inner cavity of the hard part 200. The cutting fluid sprayed by the CNC machine tool spindle flows into the liquid flow hole 111, pushing the driving member 21 to move axially along the liquid flow hole 111, and the driving member 21 sequentially contacts the connecting protrusion 3111 and the contact inclined surface 311, so that the action member 31 moves along the guide groove 312 under the action of the guide member 32, and the end of the action member 31 away from the driving member 21 slides outward from the first groove 112, and when the driving member 21 and the contact inclined surface 311 fit each other, the end of the action member 31 away from the driving member 21 completely slides out, and contacts with the back or front of the inner cavity of the hard part 200 to perform the burr removal operation.

[0042] After the burr removal operation is completed, the CNC machine tool spindle stops spraying cutting fluid, the second elastic member 25 drives the actuating member 31 to reset, and the first elastic member 23 drives the driving member 21 to reset. The structure of the hard part inner cavity burr removal device after reset can be seen in Figure 3 .

[0043] The present invention provides a device for removing burrs from the inner cavity of a hard part. The device utilizes a CNC machine tool spindle to spray cutting fluid with a high hydraulic pressure as a programmable control power source. The drive unit is arranged inside a connecting unit, and the connecting unit is connected to the CNC machine tool. The drive unit can be pushed to move under high hydraulic pressure, and the drive unit then drives the action unit to move, so that the action unit contacts the inner cavity of the hard part to complete the burr removal operation. The device is easy to use, improves the burr removal efficiency, ensures the quality stability of hard part products, and saves labor.

[0044] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A device for removing burrs from the inner cavity of a hard part, used for removing burrs from the inner cavity of a hard part under the control of a CNC machine tool, characterized in that: The device comprises a connecting unit, a driving unit and an action unit, wherein the connecting unit is connected to the tool handle of the CNC machine tool, the driving unit is arranged inside the connecting unit, and the action unit is arranged at one end of the connecting unit away from the tool handle of the CNC machine tool. The driving unit moves under the impetus of the cutting fluid sprayed by the spindle of the CNC machine tool flowing into the connecting unit, and the action unit contacts the inner cavity of the hard part to remove burrs under the drive of the driving unit. The connecting unit comprises a connecting rod, a liquid flow hole is provided in the middle of the connecting rod, the liquid flow hole passes through the connecting rod, a first groove and a second groove are provided on a side wall of one end of the connecting rod away from the CNC machine tool handle, the first groove and the second groove are arranged opposite to each other, the first groove and the second groove are both connected to the liquid flow hole, the groove depth of the first groove along the axial direction of the connecting rod is less than the groove depth of the second groove along the axial direction of the connecting rod, the driving unit is arranged in the liquid flow hole, and the end of the action unit close to the driving unit is arranged in the connecting rod at a position corresponding to the second groove; The driving unit comprises a driving member, a first connecting member, a first elastic member, a second connecting member and a second elastic member, wherein the first connecting member is fixed to the inner wall of the liquid flow hole, one end of the first elastic member is connected to the first connecting member, and the other end of the first elastic member is connected to the driving member, the driving member is movably arranged in the liquid flow hole along the axial direction of the liquid flow hole, a receiving groove is provided on the side wall of the driving member close to the second groove, the second connecting member is fixed to the groove wall of the receiving groove, one end of the second elastic member is connected to the second connecting member, and the other end of the second elastic member is connected to the action unit; The action unit includes an action piece and a guide piece, wherein one end of the action piece close to the driving piece is arranged at a position in the connecting rod corresponding to the second groove, one end of the action piece close to the driving piece is provided with a contact inclined surface facing the first groove, one end of the contact inclined surface close to the first groove is located in the first groove, and there is a first distance between the end of the contact inclined surface close to the first groove and the groove bottom surface of the first groove, one end of the contact inclined surface close to the second groove is provided with a connecting protrusion, the connecting protrusion is connected to the second elastic piece, and the connecting protrusion contacts the driving piece, the side wall of the action piece close to the first groove is located in the first groove, and a guide groove is provided in the middle position of the action piece, one end of the guide piece is fixed on the inner wall on one side of the liquid flow hole, and the other end of the guide piece is fixed on the inner wall on the other side of the liquid flow hole after passing through the guide groove.

2. A hard parts inner cavity burr removal device as claimed in claim 1, characterized in that: The action unit also includes a fixed rotating member, a first clamping member and a second clamping member, the first clamping member and the second clamping member are respectively located on both sides of the action member, the groove walls of the first groove and the second groove are both fitted with the first clamping member, the groove walls of the first groove and the second groove are both fitted with the second clamping member, the side wall of the first clamping member close to the first groove is located in the first groove, and the side wall of the second clamping member close to the first groove is located in the first groove, a rotating hole is provided in the middle of the action member, a first connecting hole is provided at a position corresponding to the rotating hole on the first clamping member, a second connecting hole is provided at a position corresponding to the rotating hole on the second clamping member, and a first fixing hole and a second fixing hole are provided at a position corresponding to the rotating hole on the side wall of the connecting rod, and the fixed rotating member passes through the first fixing hole, the first connecting hole, the rotating hole, the second connecting hole, and the second fixing hole in sequence to connect the first clamping member, the action member, the second clamping member and the connecting rod.

3. A hard parts inner cavity burr removal device as claimed in claim 2, characterized in that: The end surface of the first clamping member away from the driving member and the end surface of the second clamping member away from the driving member are both coplanar with the end surface of the connecting rod close to the actuating member.

4. A hard parts inner cavity burr removal device as claimed in claim 2, characterized in that: The guide groove is in an arc-shaped structure, and the central axis of the guide groove is coaxially arranged with the central axis of the rotating hole.

5. The device for removing burrs from the inner cavity of a hard part according to claim 1, characterized in that: The thickness of the side wall of the actuating member close to the first groove is smaller than the thickness of the side wall of the actuating member close to the second groove.

6. A hard parts inner cavity burr removal device as claimed in claim 1, characterized in that: The liquid flow hole includes a first part, a second part and a third part from an end away from the first groove to an end close to the first groove, the first part, the second part and the third part are connected in sequence, the inner diameter of the first part is smaller than the inner diameter of the second part, the inner diameter of the second part is smaller than the inner diameter of the third part, the first groove and the second groove are both connected to the third part, the height of the third part along the axial direction of the connecting rod is greater than the groove depth of the second groove along the axial direction of the connecting rod, the first connecting member is fixed on the inner wall of the second part, and the driving member is movably arranged in the third part.

7. A hard parts inner cavity burr removal device as claimed in claim 1, characterized in that: A pressure relief port is provided at one end of the driving member close to the first elastic member, and the pressure relief port is communicated with the accommodating groove.

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