Lathe machining fixing device

Abstract

The utility model discloses a lathe machining fixing device which comprises a positioning frame and a center positioning mechanism, and the center positioning mechanism is arranged in the positioning frame. The center positioning mechanism comprises two electric transverse driving pieces and two electric longitudinal driving pieces, the two electric transverse driving pieces are horizontally and symmetrically arranged in the middle of the left side and the right side of the positioning frame, and the two electric longitudinal driving pieces are vertically and symmetrically arranged on the upper side and the lower side in the positioning frame. The ends, located in the positioning frame, of the electric transverse driving pieces are each provided with a shifting clamping head, and the middle positions of the electric longitudinal driving pieces are each provided with a fixed clamping head. A longitudinal displacement connecting piece is arranged in the displacement clamping head, and the longitudinal displacement connecting piece is used for enabling the displacement clamping head to longitudinally move relative to the electric transverse driving piece when the fixed clamping head longitudinally moves relative to the fixed clamping head; according to the utility model, the workpiece can be automatically and accurately fixed at a standard center position.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe processing, in particular to a lathe processing fixing device. Background Art

[0002] At present, the metalworking training courses of mechanical or electrical engineering majors in schools involve the operation of components such as CNC lathes. Since most students only have a theoretical understanding of the lathe itself and are completely blank in terms of actual operation, the teacher will conduct practical teaching in the course. However, when students actually operate the lathe, they will encounter various situations due to their lack of proficiency. Taking the actual operation of the lathe as an example, the workpiece to be processed needs to be fixed in the workpiece fixture, and then the electric control tool is started for processing. However, some students cannot accurately place the workpiece in the standard processing position when fixing the workpiece. For example, for a rectangular workpiece, the center of the workpiece cannot be aligned with the machining center of the tool head, which will result in shape errors in the final processed workpiece and damage the lathe itself.

[0003] Therefore, a lathe processing fixture is badly needed. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a lathe processing fixing device which is convenient for fixing a workpiece at a center position.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A lathe machining fixture device comprises a positioning frame and a center positioning mechanism for positioning a workpiece, wherein the center positioning mechanism is arranged in the positioning frame;

[0007] The center positioning mechanism includes two electric transverse driving members and two electric longitudinal driving members, the two electric transverse driving members are horizontally symmetrically arranged at the middle positions of the left and right sides of the positioning frame, and the two electric longitudinal driving members are vertically symmetrically arranged at the upper and lower sides of the positioning frame, and the electric transverse driving members are respectively provided with shift clamping heads at one end of the electric transverse driving member located in the positioning frame, and the middle positions of the electric longitudinal driving members are respectively provided with fixed clamping heads, the electric transverse driving members drive the shift clamping heads to make relative movements horizontally toward the center position of the positioning frame, and the electric longitudinal driving members drive the fixed clamping heads to make relative movements longitudinally toward the center position of the positioning frame, so that the workpiece is fixed to the center position of the positioning frame through the shift clamping heads and the fixed clamping heads;

[0008] The shift clamping head is provided with a longitudinal shift connecting piece, and the longitudinal shift connecting piece is used to make the shift clamping head move longitudinally relative to the electric transverse driving piece when the fixed clamping head makes a longitudinal relative movement.

[0009] Furthermore, the positioning frame is square, and includes two transverse plates and two longitudinal plates. The two transverse plates are arranged in parallel vertically, and the two longitudinal plates are arranged in parallel horizontally. Adjacent longitudinal plates and transverse plates are respectively vertically connected.

[0010] Furthermore, the electric transverse driving member includes an external transverse guide rail, a transverse moving seat and a transverse push rod, the external transverse guide rail is vertically connected to the outer side of the longitudinal plate body, the transverse moving seat is slidably connected to the external transverse guide rail, one end of the transverse push rod is fixedly connected to the transverse moving seat, and the other end passes through the longitudinal plate body and is arranged in the positioning frame and connected to the shift clamping head, and the transverse moving seat is controlled to slide in the external transverse guide rail to control the transverse movement of the shift clamping head in the positioning frame.

[0011] Furthermore, the shift clamping head includes an internal clamping block, an external shift plate and a shift frame, one side of the internal clamping block is connected to the transverse push rod, the upper and lower ends of the internal clamping block are respectively connected to the longitudinal shift connecting piece, the shift frame is arranged outside the internal clamping block and the inner side of the shift frame is connected to the longitudinal shift connecting piece, the external shift plate is arranged parallel to the internal clamping block and connected to the shift frame, and the longitudinal shift connecting piece can maintain a distance space between the shift frame and the internal clamping block in a non-clamping state, thereby satisfying the longitudinal movement of the shift frame after actual clamping.

[0012] Furthermore, the internal clamping block is provided with two connecting grooves on one side close to the external shift plate, and expansion springs are respectively provided in the connecting grooves and the expansion springs are connected to the inner side of the external shift plate, and an electromagnet is provided on the internal clamping block between the connecting grooves, and a magnetic suction sheet is provided on the inner side of the external shift plate corresponding to the electromagnet. When clamping horizontally, the expansion spring can be used to clamp the workpiece when the external shift plate and the internal clamping block are not in direct contact, and when clamping longitudinally, the external shift plate can also be longitudinally shifted, and the electromagnet and the magnetic suction sheet attract each other, so that the external shift plate and the internal clamping block are attached to each other, making the horizontal clamping more stable.

[0013] Furthermore, the electric longitudinal drive component includes two longitudinal guide rails, two longitudinal movable seats and a transverse connecting rod. The longitudinal guide rails are respectively vertically connected to the two ends of the inner side of the transverse plate body, and the longitudinal movable seats are respectively slidably connected to the longitudinal guide rails. The transverse connecting rod is horizontally arranged and the two ends are respectively connected to the two longitudinal movable seats. The fixed clamping head is fixed to the middle position of the transverse connecting rod, and the longitudinal movable seat is controlled to slide in the longitudinal guide rail to control the longitudinal movement of the fixed clamping head in the positioning frame.

[0014] Furthermore, the fixed clamping head includes a connecting seat and a replacement head, the connecting seat is connected to the middle part of the transverse connecting rod, and the replacement head is detachably connected to the connecting seat.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model drives the shift clamping head to make relative movement horizontally toward the center position of the positioning frame by an electric horizontal driving part, and drives the fixed clamping head to make relative movement vertically toward the center position of the positioning frame by an electric vertical driving part, thereby fixing the workpiece at the center position of the positioning frame by the shift clamping head and the fixed clamping head. During the whole workpiece clamping process, there is no need for personnel to manually adjust the position. Through the horizontal clamping and vertical clamping in steps, the workpiece is automatically fixed at the standard center position, thereby reducing processing failures and damage to the lathe itself caused by improper placement of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure diagram of the utility model is shown;

[0018] Figure 2 The working schematic diagram of the electric longitudinal drive member of the utility model is shown;

[0019] Figure 3 Shows Figure 1 The schematic diagram of the structure of the shift clamping head of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the shift clamping head in the longitudinal clamping state;

[0021] In the figure: 1. positioning frame; 2. shifting clamping head; 3. fixed clamping head; 4. longitudinal plate; 5. transverse plate; 6. longitudinal shifting connector; 7. external transverse guide rail; 8. transverse moving seat; 9. transverse push rod; 10. internal clamping block; 11. external shifting plate; 12. shifting frame; 13. connecting groove; 14. expansion spring; 15. electromagnet; 16. magnetic suction sheet; 17. longitudinal guide rail; 18. longitudinal moving seat; 19. transverse connecting rod; 20. connecting seat; 21. replacement head. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0023] like Figure 1-Figure 4 As shown, a lathe machining fixing device comprises a positioning frame 1 and a center positioning mechanism for positioning a workpiece, wherein the center positioning mechanism is arranged in the positioning frame 1 .

[0024] The positioning frame 1 is square, and includes two transverse plates 5 and two longitudinal plates 4. The two transverse plates 5 are arranged in parallel vertically, and the two longitudinal plates 4 are arranged in parallel horizontally. Adjacent longitudinal plates 4 and transverse plates 5 are respectively vertically welded and connected.

[0025] The center positioning mechanism includes two electric transverse driving members and two electric longitudinal driving members. The two electric transverse driving members are horizontally symmetrically fixed at the middle position of the longitudinal plates 4 on the left and right sides of the positioning frame 1, and the two electric longitudinal driving members are vertically symmetrically fixed at the upper and lower sides of the positioning frame 1. The electric transverse driving members are located at one end of the positioning frame 1 and are respectively fixed with a shift clamping head 2, and the middle position of the electric longitudinal driving members is respectively fixed with a fixed clamping head 3. The electric transverse driving member drives the shift clamping head 2 to make a relative movement horizontally toward the center position of the positioning frame 1, and the electric longitudinal driving member drives the fixed clamping head 3 to make a relative movement longitudinally toward the center position of the positioning frame 1, thereby fixing the workpiece at the center position of the positioning frame 1 through the shift clamping head 2 and the fixed clamping head 3.

[0026] The electric transverse driving member includes an external transverse guide rail 7, a transverse moving seat 8 and a transverse push rod 9. The external transverse guide rail 7 is vertically welded to the outer side of the longitudinal plate body 4. The transverse moving seat 8 is slidably connected to the external transverse guide rail 7. The transverse moving seat 8 is a rectangular parallelepiped with a hole 1 at the center. A hole 2 is provided on the longitudinal plate body 4 with the same height and diameter as the hole 1. One end of the transverse push rod 9 passes through the hole 1 and is welded to the transverse moving seat 8. The other end of the transverse push rod 9 passes through the hole 2 and is located in the positioning frame 1 and is welded to the shift clamping head 2. The electrically driven transverse moving seat 8 slides in the external transverse guide rail 7, driving the transverse push rod 9 to move laterally, thereby driving the shift clamping head 2 to make a relative lateral movement to achieve transverse clamping of the workpiece.

[0027] The shift clamping head 2 includes an internal clamping block 10, an external shift plate 11 and a shift frame 12. One side of the internal clamping block 10 is welded to the transverse push rod 9. The upper and lower ends of the internal clamping block 10 are respectively fixed with longitudinal shift connecting members 6. In this embodiment, the longitudinal shift connecting member 6 is a shift connecting spring. The shift frame 12 is arranged on the outside of the internal clamping block 10 and the inner side of the shift frame 12 is fixedly connected to the longitudinal shift connecting member 6. The external shift plate 11 is arranged parallel to the internal clamping block 10 and is welded to the shift frame 12. The longitudinal shift connecting member 6 can maintain a distance space between the shift frame 12 and the internal clamping block 10 in a non-clamping state, thereby satisfying the longitudinal movement of the shift frame 12 after actual clamping.

[0028] Two connecting grooves 13 are symmetrically provided on one side of the internal clamping block 10 close to the external shift plate 11. The connecting grooves 13 are rectangular, cubic or cylindrical. Expansion springs 14 are respectively provided in the connecting grooves 13 and the expansion springs 14 are fixedly connected to the inner side of the external shift plate 11. An electromagnet 15 is provided on the internal clamping block 10 between the connecting grooves 13, and a magnetic suction piece 16 is provided at a position corresponding to the electromagnet 15 on the inner side of the external shift plate 11. The expansion spring 14 is provided to maintain a distance space between the external shift plate 11 and the internal clamping block 10. When clamping horizontally, the expansion spring 14 is used to clamp the workpiece when the external shift plate 11 and the internal clamping block 10 are not in direct contact. When clamping longitudinally, the external shift plate 11 can be longitudinally displaced, that is, the workpiece is longitudinally moved, and the electromagnet 15 and the magnetic suction piece 16 attract each other, so that the external shift plate 11 and the internal clamping block 10 are attached to each other, making it more stable when clamping horizontally.

[0029] In this embodiment, the magnetic sheet 16 is a metal plate that can be magnetically attracted, and the electromagnet 15 is magnetic when powered on. When the workpiece is clamped longitudinally, the external shift plate 11 and the internal clamping block 10 will have a longitudinal displacement. At this time, the transverse clamping state is released, that is, the external shift plate 11 and the workpiece are separated. Under the automatic elastic action of the longitudinal shift connector 6, the external shift plate 11 and the internal clamping block 10 are located in a positive relative position. At this time, transverse clamping is performed again. Since the external shift plate 11 and the internal clamping block 10 are not in direct contact, the electromagnet 15 is started and powered on to make it magnetic and attract the magnetic sheet 16, so that the external shift plate 11 and the internal clamping block 10 are directly attached to each other, making the transverse clamping more stable.

[0030] The electric longitudinal drive component includes two longitudinal guide rails 17, two longitudinal movable seats 18 and a transverse connecting rod 19. The longitudinal guide rails 17 are respectively vertically welded to the two ends of the inner side of the transverse plate 5. The longitudinal movable seats 18 are respectively slidably connected in the longitudinal guide rails 17. The transverse connecting rod 19 is horizontally arranged and the two ends are respectively welded to the two longitudinal movable seats 18. The fixed clamping head 3 is fixed at the middle position of the transverse connecting rod 19. The longitudinal movable seat 18 slides in the longitudinal guide rail 17 to control the longitudinal relative movement of the fixed clamping head 3 in the positioning frame 1.

[0031] The fixed clamping head 3 includes a connecting seat 20 and a replacement head 21. The connecting seat 20 is welded to the middle part of the transverse connecting rod 19. The replacement head 21 is detachably connected to the connecting seat 20. The corresponding replacement head 21 can be replaced according to the longitudinal shape of the workpiece, thereby achieving a more stable clamping effect.

[0032] The usage process of this embodiment is as follows:

[0033] During actual use, the positioning frame 1 is fixedly connected to the lathe. When the workpiece needs to be clamped, the workpiece is first placed in the positioning frame 1, and the two electric transverse driving members are controlled to start working. At this time, the two shift clamping heads 2 move relative to each other to clamp the workpiece laterally. At this time, the transverse center of the workpiece is determined, and then the two electric longitudinal driving members are controlled to start working to drive the two fixed clamping heads 3 to clamp the workpiece. At this time, the workpiece is not necessarily in the longitudinal center position, so that one of the fixed clamping heads 3 contacts the workpiece first, and the other fixed clamping head 3 contacts the workpiece later. Since the longitudinal shift connecting member 6 and the expansion spring 14 are provided in the shift clamping head 2, the external shift plate 11 and the shift frame 12 can move longitudinally relative to the internal clamping block 10. Therefore, during the relative movement of the two fixed clamping heads 3, the workpiece can be clamped in the longitudinal center position. At this time, the workpiece is simultaneously in the transverse center position and the longitudinal center position, that is, the standard machining center position.

Claims

1. A lathe processing fixture, characterized in that: It comprises a positioning frame (1) and a center positioning mechanism for positioning a workpiece, wherein the center positioning mechanism is arranged in the positioning frame (1); The center positioning mechanism comprises two electric transverse driving members and two electric longitudinal driving members, the two electric transverse driving members are horizontally symmetrically arranged at the middle positions of the left and right sides of the positioning frame (1), and the two electric longitudinal driving members are vertically symmetrically arranged at the upper and lower sides of the positioning frame (1), and the electric transverse driving members are respectively provided with a shift clamping head (2) at one end located in the positioning frame (1), and the electric longitudinal driving members are respectively provided with a fixed clamping head (3) at the middle position, the electric transverse driving member drives the shift clamping head (2) to make a relative movement toward the center position of the positioning frame (1) in the transverse direction, and the electric longitudinal driving member drives the fixed clamping head (3) to make a relative movement toward the center position of the positioning frame (1) in the longitudinal direction, so that the workpiece is fixed to the center position of the positioning frame (1) through the shift clamping head (2) and the fixed clamping head (3); The shifting clamping head (2) is provided with a longitudinal shifting connecting member (6), and the longitudinal shifting connecting member (6) is used to enable the shifting clamping head (2) to move longitudinally relative to the electric transverse driving member when the fixed clamping head (3) makes longitudinal relative movement.

2. A lathe processing fixture as claimed in claim 1, characterized in that: The positioning frame (1) is square and comprises two transverse plates (5) and two longitudinal plates (4). The two transverse plates (5) are arranged vertically and parallelly, and the two longitudinal plates (4) are arranged horizontally and parallelly. Adjacent longitudinal plates (4) and transverse plates (5) are respectively vertically connected.

3. A lathe processing fixture as claimed in claim 2, characterized in that: The electric transverse driving member comprises an external transverse guide rail (7), a transverse moving seat (8) and a transverse push rod (9); the external transverse guide rail (7) is vertically connected to the outer side of the longitudinal plate (4); the transverse moving seat (8) is slidably connected to the inside of the external transverse guide rail (7); one end of the transverse push rod (9) is fixedly connected to the transverse moving seat (8); the other end passes through the longitudinal plate (4) and is arranged in the positioning frame (1) and connected to the shift clamping head (2); the transverse moving seat (8) slides in the external transverse guide rail (7) to control the transverse movement of the shift clamping head (2) in the positioning frame (1).

4. A lathe processing fixture as claimed in claim 3, characterized in that: The shift clamping head (2) comprises an internal clamping block (10), an external shifting plate (11) and a shifting frame (12); one side of the internal clamping block (10) is connected to the transverse push rod (9); the upper and lower ends of the internal clamping block (10) are respectively connected to the longitudinal shifting connecting piece (6); the shifting frame (12) is arranged outside the internal clamping block (10) and the inner side of the shifting frame (12) is connected to the longitudinal shifting connecting piece (6); the external shifting plate (11) is arranged parallel to the internal clamping block (10) and is connected to the shifting frame (12); the longitudinal shifting connecting piece (6) can maintain a distance space between the shifting frame (12) and the internal clamping block (10) in a non-clamping state, thereby satisfying the longitudinal movement of the shifting frame (12) after actual clamping.

5. A lathe processing fixture as claimed in claim 4, characterized in that: The inner clamping block (10) is provided with two connecting grooves (13) on one side close to the outer displacement plate (11), and expansion springs (14) are respectively provided in the connecting grooves (13) and the expansion springs (14) are connected to the inner side of the outer displacement plate (11), an electromagnet (15) is provided on the inner clamping block (10) between the connecting grooves (13), and a magnetic attraction sheet (16) is provided on the inner side of the outer displacement plate (11) at a position corresponding to the electromagnet (15). During transverse clamping, the expansion spring (14) enables the external shift plate (11) to clamp the workpiece even when there is no direct contact between the external shift plate (11) and the internal clamping block (10). During longitudinal clamping, the external shift plate (11) can also be longitudinally displaced. The electromagnet (15) and the magnetic suction sheet (16) attract each other, so that the external shift plate (11) and the internal clamping block (10) are in contact with each other, making transverse clamping more stable.

6. A lathe machining fixture as claimed in claim 2, characterized in that: The electric longitudinal drive member comprises two longitudinal guide rails (17), two longitudinal movable seats (18) and a transverse connecting rod (19); the longitudinal guide rails (17) are respectively vertically connected to the two ends of the inner side of the transverse plate (5); the longitudinal movable seats (18) are respectively slidably connected in the longitudinal guide rails (17); the transverse connecting rod (19) is horizontally arranged and the two ends are respectively connected to the two longitudinal movable seats (18); the fixed clamping head (3) is fixed at the middle position of the transverse connecting rod (19); and the longitudinal movable seat (18) is slidably controlled in the longitudinal guide rails (17) to move longitudinally in the positioning frame (1).

7. A lathe processing fixture as claimed in claim 6, characterized in that: The fixed clamping head (3) comprises a connecting seat (20) and a replacement head (21), wherein the connecting seat (20) is connected to the middle part of the transverse connecting rod (19), and the replacement head (21) is detachably connected to the connecting seat (20).

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