A workpiece fixing mechanism for casting end face milling processing equipment

Abstract

The present invention discloses a workpiece fixing mechanism for a casting end face milling processing equipment, comprising a movable worktable, on which a tool fixing seat is fixedly connected; a horizontal clamping mechanism, comprising a tool base, a U-shaped clamping block is fixedly installed in the middle of the tool base, a support plate is fixedly installed on the top of the U-shaped clamping block, a push piece is movably installed between the two ends of the U-shaped clamping block, and corresponding top tightening blocks are respectively installed on both sides of the push piece; a longitudinal clamping mechanism, a group of plug-in holes are respectively arranged on both sides of the tool base, the longitudinal clamping mechanism comprises a limit rod plugged into the plug-in hole, and a downward pressure oil cylinder is arranged on the upper side of the tool base, and corresponding buffer springs are respectively fixedly installed in the plug-in hole at the bottom of the limit rod. The present invention can enhance the clamping stability of the workpiece, and can effectively reduce the vibration caused by large-area milling processing without affecting the clamping stability.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece fixing fixtures for workpiece milling processing equipment, and in particular to a workpiece fixing mechanism for casting end face milling processing equipment. Background Art

[0002] Some castings need to be milled after processing. For example, the corner pieces in logistics container castings need to be cut and separated by corresponding cutting equipment after casting and then milled by corresponding milling equipment.

[0003] At present, the end milling processing equipment for container corner castings mainly adopts a double-sided milling machine. The container corner castings are fixed to the corresponding fixtures through the corresponding manipulators, and then the fixtures with the workpieces installed are transferred through the main spindle heads of the double-sided milling machine through the mobile workbench to complete the milling processing of the two end faces of the workpiece at one time. The fixtures used in the existing end milling processing equipment for container corner castings generally include a fixture base for fixing the workpiece, and a downward pressure cylinder arranged on the top of the fixture base. The downward pressure block arranged at the piston rod end of the downward pressure cylinder cooperates with the fixture base to form an upper and lower clamping of the workpiece. Since the container corner castings are generally hollow, and corresponding positioning holes are arranged on the three end faces, and in order to ensure the stability of the clamping, the clamping preload force is relatively high, the container corner castings are prone to deformation during the clamping process, which is very troublesome. Moreover, during the double-sided milling process, due to the large milling area, it is easy to cause the workpiece to vibrate significantly during the processing, thereby causing adverse effects on the processing process.

[0004] Therefore, the purpose of this invention is to design a workpiece fixing mechanism for the end face milling processing equipment of castings, which can simultaneously form longitudinal and transverse clamping pre-tightening forces on the workpiece, thereby enhancing the clamping stability of the workpiece and reducing the longitudinal clamping pre-tightening force of the workpiece; and can effectively reduce the vibration caused by large-area milling processing without affecting the clamping stability, thereby improving the processing accuracy. Summary of the invention

[0005] In view of the technical problems existing in the above-mentioned prior art, the present invention provides a workpiece fixing mechanism for a casting end face milling processing equipment, which can effectively solve the technical problems existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A workpiece fixing mechanism for a casting end face milling processing equipment, comprising

[0008] A mobile workbench, on which a corresponding tool fixing seat is fixedly connected;

[0009] The cam is fixedly mounted on the workbench, and the cam is secured to the upper and lower surfaces of the workbench and is used for mounting the cams on the workbench. The cams are secured to the upper and lower surfaces of the workbench and are used for mounting the cams on the workbench.

[0010] A longitudinal clamping mechanism, wherein a group of corresponding plug-in holes are respectively provided on both sides of the tooling base, and the longitudinal clamping mechanism comprises a limit rod inserted in the plug-in hole, and a downward pressure oil cylinder arranged on the upper side of the tooling base, and corresponding buffer springs are fixedly installed in the plug-in holes at the bottom of the limit rod; a corresponding external thread is provided on the bottom side of the limit rod, and an internal thread matched with the external thread of the limit rod is provided on the upper part of the plug-in hole. When the limit rod is fixedly installed to the plug-in hole by a threaded connection, the top end part of the limit rod is fixedly sleeved with a limit sleeve whose top end surface is flush with the top end surface of the support plate; when the external thread of the limit rod is located at the lower side of the plug-in hole, the upper part of the limit rod can be movably inserted in the plug-in hole, and when the limit rod is pressed down to be flush with the upper end surface of the tooling base, the buffer spring is compressed.

[0011] The two sides of the tightening block are respectively fixedly connected with corresponding abutment pieces by means of bolt locking, and the abutment pieces are made of engineering plastics.

[0012] The tooling fixing seat is upwardly fixed with at least two corresponding vertical arms, the tops of the vertical arms are laterally extended outward and fixed with corresponding guide rails, corresponding fixed beams are movably mounted on the guide rails, and the downward pressure cylinder is fixed to the fixed beams.

[0013] A corresponding beam driving cylinder is fixedly connected to the fixed beam, and a piston rod end of the beam driving cylinder is connected to the corresponding vertical arm.

[0014] A corresponding crimping piece is fixedly connected downwardly to the piston rod end of the pressing oil cylinder, and the piston rod of the pressing oil cylinder extends out to drive the crimping piece to be fixedly crimped on the upper end surface of the workpiece.

[0015] The bottom side of the crimping piece is fixedly connected downwardly to a corresponding abutment plate through a corresponding vibration-damping gasket, and a plurality of corresponding vibration-damping microholes are evenly distributed on the vibration-damping gasket.

[0016] The crimping piece is evenly distributed with a plurality of corresponding guide holes, and the vibration-damping gasket is provided with corresponding vibration-damping sleeves at positions corresponding to the guide holes. The vibration-damping sleeves extend through and extend to the outside of the corresponding guide holes and are fixedly filled with a plurality of corresponding vibration-damping damping particles.

[0017] A gap is provided between the outer side wall of the vibration-damping sleeve and the guide hole.

[0018] Advantages of the present invention:

[0019] 1) When fixing a workpiece with a positioning hole, the present invention firstly drives the push member to move upward by the oil cylinder to drive the push member to move synchronously inward, thereby facilitating the fixed installation of the workpiece with the positioning hole. When the workpiece with the positioning hole is fixed to the transverse clamping mechanism, the positioning hole set on the workpiece is sleeved on the periphery of the U-shaped clamping block; after the workpiece is installed in place, the downward pressure oil cylinder moves downward to form a downward pressure clamping on the workpiece until the limiting rod is pressed down to be flush with the upper end surface of the tooling base. At this time, the buffer spring is compressed to clamp the workpiece without a positioning hole. The position where the positioning hole is arranged forms an upward push, thereby forming a uniform and reasonable longitudinal clamping pre-tightening force on the workpiece; finally, the push member drives the oil cylinder to drive the push member downward to drive the clamping block to move outward synchronously, thereby tightening it to the positioning hole of the workpiece, and then being able to synchronously form longitudinal and transverse clamping pre-tightening forces on the workpiece, so as to enhance the clamping stability of the workpiece and reduce the longitudinal clamping pre-tightening force of the workpiece, thereby ensuring the clamping stability of the workpiece while effectively preventing the problem of machining accuracy not meeting the design requirements due to excessive longitudinal clamping pre-tightening force.

[0020] Synchronously form longitudinal and transverse clamping pre-tightening force on the workpiece, which can also ensure the verticality of the workpiece clamping to ensure that the milled workpiece will not have an inclined surface and cause failure.

[0021] 2) The bottom side of the limit rod of the longitudinal clamping mechanism of the present invention is provided with an external thread, and the upper part of the plug hole is provided with an internal thread that matches the external thread of the limit rod. When the limit rod is fixedly installed to the plug hole by threaded connection, the top end of the limit rod is fixedly sleeved with a limit sleeve whose top end surface is flush with the top end surface of the support plate. Thus, the use condition of the longitudinal clamping mechanism is switched, so that the support plate and the limit sleeve together form a sufficient installation plane, and then cooperate with the downward pressure cylinder to fix and install other castings without positioning holes, so that castings other than container corner parts can also be firmly clamped for end face milling, so as to greatly improve the adaptability of the equipment, that is, greatly improve the utilization rate of the equipment.

[0022] 3) Since the processing surface of double-sided milling is relatively large, the vibration generated by the processing is more obvious. For this reason, the bottom side of the crimping part of the present invention is fixed downward with an abutment plate through a corresponding vibration-damping gasket. During the clamping process, the abutment plate directly presses the top surface of the workpiece. When the vibration generated by the processing is transmitted through the vibration-damping gasket, resonance is formed in the vibration-damping microholes, thereby forming preliminary vibration reduction; the vibration can also be partially transmitted to the vibration-damping sleeve, thereby effectively further forming vibration reduction without affecting the normal operation of the downward pressure cylinder, thereby effectively reducing the vibration caused by large-area milling processing without affecting the stability of the clamping, so as to significantly improve the milling accuracy of the product through vibration reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 This is an exploded view of the parts of the horizontal clamping mechanism.

[0025] Figure 3 This is the assembly cross-sectional view of the transverse clamping mechanism.

[0026] Figure 4 It is a schematic structural diagram of the limiting rod of the present invention when it is screwed into the plug hole.

[0027] Figure 5 The diagram is a structural diagram of a limiting sleeve sleeved on the top end of a limiting rod.

[0028] Figure 6 The present invention is used in a double-sided milling machine.

[0029] In the accompanying drawings: a movable workbench 1, a tooling fixed seat 2, a horizontal clamping mechanism 3, a tooling base 301, a U-shaped clamping block 302, a support plate 303, a push member 304, a clamping portion 3041, a push member driving cylinder 305, a tightening block 306, a limiting slide groove 3061, a longitudinal clamping mechanism 4, a limiting rod 401, a downward pressure cylinder 402, a buffer spring 403, a plug-in hole 5, a limiting sleeve 6, an abutment 7, a vertical arm 8, a guide rail 9, a fixed beam 10, a beam driving cylinder 11, a crimping member 12, a workpiece 13, a vibration-damping gasket 14, an abutment plate 15, and a vibration-damping sleeve 16. DETAILED DESCRIPTION

[0030] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments in conjunction with the accompanying drawings:

[0031] refer to Figure 1-6 , a workpiece fixing mechanism for a casting end face milling processing equipment, comprising

[0032] A mobile workbench 1, to which a corresponding tool fixing seat 2 is fixedly connected;

[0033] The horizontal clamping mechanism 3 comprises a plurality of tooling bases 301 fixedly connected to the tooling fixing seat 2 in parallel, wherein a U-shaped clamping block 302 with an opening facing upward is fixedly installed in the middle of each tooling base 301, a corresponding support plate 303 is fixedly installed on the top of each U-shaped clamping block 302, and corresponding blocking members 304 are movably installed up and down between the two ends of each U-shaped clamping block 302, and the two sides of each blocking member 304 are respectively arranged in an inclined shape and convexly provided with corresponding clamping portions 3041, and the blocking member 304 is installed on the tooling fixing seat 2. The push-block driving cylinder 305 in the fixed seat 2 is driven; corresponding tightening blocks 306 are respectively installed on both sides of the push-block 304, and the inner side of the tightening block 306 is set to be an inclined surface adapted to the push-block 304, and is provided with a limiting slide groove 3061 clamped to the clamping portion 3041, and the push-block driving cylinder 305 drives the push-block 304 upward, driving the tightening block 306 to move inward, and the push-block driving cylinder 305 drives the push-block 304 downward, driving the tightening block 306 to move outward;

[0034] A longitudinal clamping mechanism 4, a group of corresponding plug-in holes 5 are respectively arranged on both sides of the tooling base 301, the longitudinal clamping mechanism 4 includes a limiting rod 401 plugged into the plug-in hole 5, and a downward pressure cylinder 402 arranged on the upper side of the tooling base 301, and corresponding buffer springs 403 are respectively fixedly installed in the plug-in hole 5 at the bottom of the limiting rod 401; the bottom side of the limiting rod 401 is provided with a corresponding external thread, and the upper part of the plug-in hole 5 is provided with an external thread connected to the limiting rod 401 With matching internal threads, when the limiting rod 401 is fixedly installed to the plug-in hole 5 by means of a threaded connection, the top end of the limiting rod 401 is fixedly sleeved with a limiting sleeve 6 whose top end surface is flush with the top end surface of the support plate 303; when the external thread of the limiting rod 401 is located at the lower side of the plug-in hole 5, the upper part of the limiting rod 401 can be movably inserted into the plug-in hole 5, and when the limiting rod 401 is pressed down to be flush with the upper end surface of the tooling base 301, the buffer spring 403 is compressed.

[0035] When fixing the workpiece 13 with the positioning hole, the present invention firstly drives the push member 305 to drive the push member 304 upward to drive the clamping block 306 to move inward synchronously, thereby facilitating the fixed installation of the workpiece 13 with the positioning hole. When the workpiece 13 with the positioning hole is fixed to the horizontal clamping mechanism 3, the positioning hole set on the workpiece 13 is sleeved on the periphery of the U-shaped clamping block 302; after the workpiece 13 is installed in place, the downward pressure cylinder 402 moves downward to form a downward pressure clamping on the workpiece 13 until the limiting rod 401 is pressed down to be flush with the upper end surface of the tooling base 301. At this time, the buffer spring 403 is compressed An upward push is formed on the position where the positioning hole is not set on the workpiece 13, thereby forming a uniform and reasonable longitudinal clamping pre-tightening force on the workpiece 13; finally, the push member drives the oil cylinder 305 to drive the push member 304 downward, so as to drive the clamping block 306 to move outward synchronously, so as to be tightened to the positioning hole of the workpiece 13, and then longitudinal and transverse clamping pre-tightening forces can be formed on the workpiece 13 synchronously, so as to strengthen the clamping stability of the workpiece 13 and reduce the longitudinal clamping pre-tightening force of the workpiece 13, thereby ensuring the clamping stability of the workpiece 13 while effectively preventing the problem of machining accuracy not meeting the design requirements due to excessive longitudinal clamping pre-tightening force.

[0036] The bottom side of the limiting rod 401 of the longitudinal clamping mechanism 4 of the present invention is provided with an external thread, and the upper part of the plug hole 5 is provided with an internal thread matched with the external thread of the limiting rod 401. When the limiting rod 401 is fixedly installed to the plug hole 5 by threaded connection, the top end of the limiting rod 401 is fixedly sleeved with a limiting sleeve 6 whose top end surface is flush with the top end surface of the support plate 303. Thus, the use condition of the longitudinal clamping mechanism 4 is switched, so that the support plate 303 and the limiting sleeve 6 form a sufficient installation plane together, and then cooperate with the downward pressure cylinder 402 to fix and install other castings without positioning holes, so that castings other than container corner parts can also be firmly clamped and end face milling processing can be performed, so as to greatly improve the use adaptability of the equipment, that is, greatly improve the utilization rate of the equipment.

[0037] The two sides of the tightening block 306 are respectively fixed with corresponding abutment members 7 by bolt locking, and the abutment members 7 are made of engineering plastics.

[0038] The tooling fixing seat 2 is fixedly connected upward with at least two corresponding vertical arms 8, the tops of the vertical arms 8 are extended outward laterally and fixedly connected with corresponding guide rails 9, and corresponding fixed beams 10 are movably mounted on the guide rails 9, and the downward pressure cylinder 402 is fixedly connected to the fixed beams 10.

[0039] The fixed crossbeam 10 is fixedly connected with a corresponding crossbeam driving cylinder 11 , and the piston rod end of the crossbeam driving cylinder 11 is connected to the corresponding vertical arm 8 .

[0040] The piston rod end of the pressing cylinder 402 is fixedly connected downward with a corresponding crimping piece 12 , and the piston rod of the pressing cylinder 402 extends to drive the crimping piece 12 to be fixedly crimped onto the upper end surface of the workpiece 13 .

[0041] The bottom side of the crimping member 12 is fixedly connected downwardly to a corresponding abutment plate 15 via a corresponding vibration-damping gasket 14 , and a plurality of corresponding vibration-damping microholes are evenly distributed on the vibration-damping gasket 14 .

[0042] The crimping piece 12 is evenly distributed with a plurality of corresponding guide holes, and the vibration-damping gasket 14 is provided with corresponding vibration-damping sleeves 16 at positions corresponding to the guide holes, and the vibration-damping sleeves 16 extend through and extend to the outside of the corresponding guide holes and are fixedly filled with a plurality of corresponding vibration-damping damping particles. A gap is provided between the outer wall of the vibration-damping sleeve 16 and the guide hole.

[0043] During the clamping process, the abutment plate 15 directly presses the top surface of the workpiece 13. When the vibration generated by the processing is transmitted through the vibration-damping gasket 14, resonance is formed in the vibration-damping microholes, thereby forming preliminary vibration reduction; the vibration can also be partially transmitted to the vibration-damping sleeve 16, thereby effectively further forming vibration reduction without affecting the normal operation of the downward pressure cylinder, so as to effectively reduce the vibration caused by large-area milling processing without affecting the stability of the clamping, thereby significantly improving the milling accuracy of the product through vibration reduction.

[0044] 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 scope of protection of the present invention.

Claims

1. A workpiece fixing mechanism for a casting end face milling processing equipment, characterized in that: include A movable workbench (1), wherein a corresponding tool fixing seat (2) is fixedly connected to the movable workbench (1); The transverse clamping mechanism (3) comprises a plurality of tooling bases (301) fixedly connected to the tooling fixing base (2) in parallel, wherein a U-shaped clamping block (302) with an opening facing upward is fixedly installed in the middle of each tooling base (301), a corresponding support plate (303) is fixedly installed on the top of each U-shaped clamping block (302), and corresponding blocking members (304) are movably installed up and down between the two ends of the U-shaped clamping block (302), and the two sides of the blocking member (304) are respectively arranged in an inclined shape and convexly provided with corresponding clamping parts (3041), and the blocking member (304) is installed on the tooling fixing base. (2) The push-block driving cylinder (305) in the push-block is driven; corresponding tightening blocks (306) are respectively installed on both sides of the push-block (304); the inner side of the tightening block (306) is arranged to be an inclined surface matched with the push-block (304) and is provided with a limiting slide groove (3061) clamped to the clamping part (3041); the push-block driving cylinder (305) drives the push-block (304) upward, driving the tightening block (306) to move inward; the push-block driving cylinder (305) drives the push-block (304) downward, driving the tightening block (306) to move outward; A longitudinal clamping mechanism (4), wherein a group of corresponding plug-in holes (5) are respectively arranged on both sides of the tooling base (301), the longitudinal clamping mechanism (4) comprises a limit rod (401) plugged into the plug-in hole (5), and a downward pressure cylinder (402) arranged on the upper side of the tooling base (301), and corresponding buffer springs (403) are respectively fixedly installed in the plug-in hole (5) at the bottom of the limit rod (401); the bottom side of the limit rod (401) is provided with a corresponding external thread, and the upper part of the plug-in hole (5) is provided with an external thread connected to the limit rod (401). The inner thread is adapted to the thread, and when the limiting rod (401) is fixedly installed to the plug hole (5) by means of a threaded connection, the top end of the limiting rod (401) is fixedly sleeved with a limiting sleeve (6) whose top end surface is flush with the top end surface of the support plate (303); when the outer thread of the limiting rod (401) is located at the lower side of the plug hole (5), the upper part of the limiting rod (401) can be movably inserted into the plug hole (5), and when the limiting rod (401) is pressed down to be flush with the upper end surface of the tooling base (301), the buffer spring (403) is compressed.

2. The workpiece fixing mechanism for casting end face milling equipment according to claim 1, characterized in that: The two sides of the tightening block (306) are respectively fixedly connected with corresponding abutment members (7) by means of bolt locking, and the abutment members (7) are made of engineering plastics.

3. The workpiece fixing mechanism for casting end face milling equipment according to claim 1, characterized in that: The tool fixing seat (2) is fixedly connected upwardly with at least two corresponding vertical arms (8), the tops of the vertical arms (8) are extended outwardly laterally and fixedly connected with corresponding guide rails (9), a corresponding fixed crossbeam (10) is movably mounted on the guide rails (9), and the downward pressure cylinder (402) is fixedly connected to the fixed crossbeam (10).

4. The workpiece fixing mechanism for casting end face milling equipment according to claim 3 is characterized in that: A corresponding crossbeam driving cylinder (11) is fixedly connected to the fixed crossbeam (10), and a piston rod end of the crossbeam driving cylinder (11) is connected to a corresponding vertical arm (8).

5. The workpiece fixing mechanism for casting end face milling processing equipment according to claim 1, characterized in that: The piston rod end of the downward pressing oil cylinder (402) is fixedly connected downwardly with a corresponding crimping piece (12), and the piston rod of the downward pressing oil cylinder (402) is extended to drive the crimping piece (12) to be fixedly crimped onto the upper end surface of the workpiece (13).

6. The workpiece fixing mechanism for casting end face milling equipment according to claim 5, characterized in that: The bottom side of the crimping piece (12) is fixedly connected downwardly to a corresponding abutment plate (15) via a corresponding vibration-damping gasket (14), and a plurality of corresponding vibration-damping microholes are evenly distributed on the vibration-damping gasket (14).

7. The workpiece fixing mechanism for casting end face milling equipment according to claim 6, characterized in that: The crimping piece (12) is evenly distributed with a plurality of corresponding guide holes, and the vibration-damping gasket (14) is provided with corresponding vibration-damping sleeves (16) at positions corresponding to the guide holes, the vibration-damping sleeves (16) extending through to the outside of the corresponding guide holes and fixedly loaded with a plurality of corresponding vibration-damping damping particles.

8. The workpiece fixing mechanism for casting end face milling equipment according to claim 7, characterized in that: A gap is provided between the outer side wall of the vibration-damping sleeve (16) and the guide hole.

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