Special clamp for horizontal milling of two end faces

Abstract

A special clamp for horizontal milling of two end faces belongs to the technical field of machine tool clamps. The clamp comprises a base and a clamp seat arranged on the base, the base and the clamp seat jointly form a convex structure, air cylinder push rod mechanisms of the same structure are arranged on the upper side of the top face of the clamp seat in a left-right layout mode, rotary pressing plate mechanisms are arranged on the air cylinder push rod mechanisms, and the air cylinder push rod mechanisms are matched with the outer sides of the corresponding rotary pressing plate mechanisms. The ends, facing the center of the clamp base, of the two rotary pressing plate mechanisms are driven by stretching and retracting of the air cylinder push rod mechanism to press and loosen the two transmission shaft support workpieces respectively, through holes are formed in the positions, corresponding to the two transmission shaft support workpieces, of the top face of the clamp base, and auxiliary supporting mechanisms are arranged on the base and correspond to the two through holes respectively. The positioning precision and the stability of the clamp can be improved, the adjusting operation is simplified, the machining efficiency is improved, the machining requirements of transmission shaft supports of different specifications can be met, and the manufacturing cost and the time cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lathe fixture technical field, concretely relates to a special fixture of two end surface horizontal milling. BACKGROUND

[0002] The fixture is an indispensable component in mechanical processing, and has been a part of a lathe and become an indispensable process equipment in mechanical processing. The transmission shaft support, as a key component of the lathe, has a decisive influence on product quality and production efficiency in terms of machining precision and assembly efficiency, and the transmission shaft support fixture, as a key auxiliary tool in the machining process, directly relates to the manufacturing quality of the support in terms of design and performance.

[0003] At present, most of the transmission shaft support fixtures on the market are based on traditional mechanical structure design, and can meet the basic positioning and clamping requirements, but still have deficiencies in high-precision and high-efficiency machining, mainly in the following aspects: first, the positioning accuracy of the fixture is not high, and it is difficult to meet the high-precision machining requirement; second, the fixture adjustment is complex and inconvenient to operate, which affects the machining efficiency; third, the fixture has poor adaptability, and different fixtures need to be replaced for different specifications of the transmission shaft support, which increases the manufacturing cost and time cost. UTILITY MODEL CONTENTS

[0004] The utility model makes up for the deficiency of the prior art in view of the above problems, and provides a special fixture for two-end-face horizontal milling. The utility model can improve the positioning accuracy and stability of the fixture, simplify the adjustment operation, improve the machining efficiency, adapt to the machining requirement of transmission shaft supports of different specifications, and reduce the manufacturing cost and time cost.

[0005] To achieve the above object, the utility model adopts the following technical scheme.

[0006] The utility model provides a special fixture for two-end-face horizontal milling, which comprises a base and a fixture seat arranged on the base, characterized in that the base and the fixture seat jointly form a convex letter-shaped structure, structure-same cylinder push rod mechanisms are arranged on the top surface of the fixture seat and distributed left and right, a rotary pressing plate mechanism is arranged on each cylinder push rod mechanism, the cylinder push rod mechanisms are matched with the corresponding rotary pressing plate mechanisms on the outer side, so that the end parts of the two rotary pressing plate mechanisms facing the center of the fixture seat are driven by the extension and retraction of the cylinder push rod mechanisms, and the two transmission shaft support workpieces are pressed and loosened respectively, through holes are arranged on the top surface of the fixture seat and correspond to the two transmission shaft support workpieces, auxiliary supporting mechanisms are arranged on the base and correspond to the two through holes respectively, and the auxiliary supporting mechanisms can pass through the through holes and be matched with the bottom surface of the transmission shaft support workpiece to perform auxiliary supporting.

[0007] Further, the cylinder push rod mechanism comprises a cylinder base, a cylinder body and a wedge, one of the cylinder bases is provided with a cylinder heightening seat below, the cylinder heightening seat is connected to the clamp seat, the other cylinder base is directly connected to the clamp seat, the cylinder body is fixed to the cylinder base, the wedge is connected to the piston rod of the cylinder body, the wedge is seated in the sliding groove block and can move along the groove of the sliding groove block, and the sliding groove block is arranged on the cylinder base.

[0008] Further, the rotating pressure plate mechanism comprises a support, a pressure plate, a roller and a first spring, the support is arranged on the cylinder base, the pressure plate is inverted L-shaped and the middle part is hinged to the support, the bent end of the pressure plate is above the workpiece, the other end is fixed to the roller, the roller cooperates with the wedge, the linear motion of the wedge pushes the roller to rotate and drives the pressure plate to rotate, and the two ends of the spring are connected to the cylinder base and the pressure plate.

[0009] Further, the rotating angle of the pressure plate is at least 60°.

[0010] Further, the auxiliary support mechanism comprises an auxiliary support seat, a screw cap, a support pin, a top pin, a second spring, a bushing and a locking screw, the auxiliary support seat is fixed to the base, the screw cap is fixed to the bottom of the auxiliary support seat, the support pin passes through the through hole and abuts against the bottom surface of the workpiece, the two ends of the second spring are connected to the top of the screw cap and the bottom of the support pin respectively, the side surface of the support pin is provided with a slope groove, the inner end of the top pin extends into the slope groove, the bushing is fixed to the side surface of the auxiliary support seat, and the locking screw extends into the auxiliary support seat from the outside in a threaded manner and is connected to the outer end of the top pin.

[0011] Further, the outer end of the locking screw is connected to a ball head, and a handle is arranged on the ball head.

[0012] Further, the clamp seat is provided with a workpiece heightening seat corresponding to the end surface of the two workpieces, the workpiece heightening seat is provided with a short positioning pin, and the short positioning pin cooperates with the end surface of the workpiece to position the workpiece.

[0013] Further, the clamp seat is provided with a tool setting seat, and a plug gauge is fixed to the tool setting seat.

[0014] Further, the clamp seat is provided with a pneumatic clamping button and a pneumatic releasing button, the pneumatic clamping button and the pneumatic releasing button are electrically connected to the two cylinder push rod mechanisms respectively to control the extension and retraction of the two cylinder push rod mechanisms.

[0015] Further, positioning keys are arranged on both sides of the base.

[0016] The utility model discloses beneficial effect.

[0017] The utility model discloses can fix two transmission shaft support workpieces simultaneously, and the two different surfaces are processed simultaneously, thereby speed up production flow, shorten the time of clamping and processing, improve production processing efficiency, can accurate fixed transmission shaft support's position, effectively prevent the error caused by vibration or removal in the processing process, thereby ensure the promotion of processing accuracy, through the standardization and standardization operation of clamp, can ensure the consistency of each processing, thereby stably promote product quality, and the stable clamping function of clamp can effectively prevent transmission shaft support workpiece accidental removal or drop in the processing process, thereby guarantee the safety of worker and equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to make the technical problem, technical scheme and beneficial effect solved by the utility model more clearly, the following is in combination with the specific embodiment, and the utility model is further detailed.The specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0019] Figure 1 It is the schematic diagram of the shaft side structure of the utility model.

[0020] Figure 2 It is another schematic diagram of the shaft side structure of the utility model.

[0021] Figure 3 It is the schematic diagram of the side cross section structure of the utility model.

[0022] Figure 4 It is the schematic diagram of the structure of the working part of the utility model.

[0023] Marked in the drawing: 1 is base, 2 is clamp seat, 3 is transmission shaft support workpiece, 4 is through hole, 5 is cylinder base, 6 is cylinder body, 7 is inclined wedge, 8 is cylinder cushion seat, 9 is sliding groove block, 10 is support, 11 is pressing plate, 12 is roller, 13 is first spring, 14 is auxiliary support seat, 15 is screw cover, 16 is support pin, 17 is top pin, 18 is second spring, 19 is bushing, 20 is locking screw, 21 is slope slot, 22 is ball head, 23 is handle, 24 is workpiece cushion seat, 25 is short positioning pin, 26 is tool setting seat, 27 is plug gauge, 28 is pneumatic clamping button, 29 is pneumatic release button, 30 is positioning key. DETAILED DESCRIPTION

[0024] The embodiment provides a special fixture of two-end-face horizontal milling, which comprises a base 1 and a fixture seat 2 arranged on the base 1, the base 1 and the fixture seat 2 jointly form a convex letter-shaped structure, positioning keys 30 are arranged on the two sides of the base 1 and are used for being connected with a machine tool, so that the mutual fixation of the fixture and the machine tool is ensured.

[0025] The same cylinder push rod mechanisms are arranged on the top surface of the fixture seat 2 and are arranged on the left and right sides.

[0026] The cylinder base 5 of one of the cylinder push rod mechanisms is arranged below a cylinder heightening seat 8, the cylinder heightening seat 8 is connected to the fixture seat 2, and the cylinder base 5 of the other cylinder push rod mechanism is directly connected to the fixture seat 2.

[0027] The cylinder body 6 is fixed to the cylinder base 5, the inclined wedge 7 is connected to the piston rod of the cylinder body 6, the piston rod of the cylinder body 6 can drive the inclined wedge 7 to reciprocate through the extension and retraction movement of the piston rod, the inclined wedge 7 is arranged in the sliding groove block 9 and can move along the groove of the sliding groove block 9, the sliding groove block 9 provides a movement track for the inclined wedge 7 and limits the movement of the inclined wedge 7, and the sliding groove block 9 is arranged on the cylinder base 5.

[0028] The rotating pressure plate 11 mechanism is arranged on the cylinder push rod mechanism, the rotating pressure plate 11 mechanism comprises a support 10, a pressure plate 11, a roller 12 and a first spring 13, the support 10 is arranged on the cylinder base 5, the pressure plate 11 is in an inverted L shape and is hinged to the middle of the support 10, the rotation angle of the pressure plate 11 is at least 60°, the bent end of the pressure plate 11 is above the transmission shaft support workpiece 3, the other end of the pressure plate 11 is fixed with the roller 12, the roller 12 is matched with the inclined wedge 7, the roller 12 is driven to rotate through the linear movement of the inclined wedge 7 and drives the pressure plate 11 to rotate, and the two ends of the spring are connected with the cylinder base 5 and the pressure plate 11.

[0029] The inverted L-shaped end of the two rotating pressure plate 11 mechanisms facing the center of the fixture seat 2 is driven by the extension and retraction of the cylinder push rod mechanism, and the two transmission shaft support workpieces 3 are pressed and loosened.

[0030] The through holes 4 are arranged on the top surface of the fixture seat 2 and correspond to the two transmission shaft support workpieces 3, and the auxiliary support mechanisms are arranged on the base 1 and correspond to the two through holes 4, the auxiliary support mechanisms can pass through the through holes 4 and are matched with the bottom surface of the transmission shaft support workpiece 3 to perform auxiliary support.

[0031] The auxiliary support mechanism comprises an auxiliary support seat 14, a screw cap 15, a support pin 16, a top pin 17, a second spring 18, a bushing 19 and a locking screw 20.

[0032] The auxiliary support seat 14 is fixed on the base 1, the screw cap 15 is fixed on the bottom of the auxiliary support seat 14, and the support pin 16 passes through the through hole 4 and abuts against the bottom surface of the transmission shaft support workpiece 3 to realize the auxiliary support of the transmission shaft support workpiece 3.

[0033] The two ends of the second spring 18 are connected with the top of the screw cap 15 and the bottom of the support pin 16 respectively, the side surface of the support pin 16 is provided with a slope type groove 21, the inner end of the top pin 17 extends into the slope type groove 21, and the vertical direction movement of the support pin 16 is driven through the reciprocating movement of the top pin 17 to adjust the support fit of the transmission shaft support workpiece 3.

[0034] The bushing 19 is fixed on the side surface of the auxiliary support seat 14, the locking screw 20 is externally screwed into the auxiliary support seat 14 through the bushing 19 and is connected with the outer end of the top pin 17, the outer end of the locking screw 20 is connected with the ball head 22, the handle 23 is arranged on the ball head 22, the operator can rotate the ball head 22 by operating the handle 23, the locking screw 20 is driven to move on the auxiliary support seat 14 through the threaded structure, and the reciprocating movement of the top pin 17 is further driven.

[0035] The workpiece heightening seat 24 is arranged on the fixture seat 2 corresponding to the end surfaces of the two transmission shaft support workpieces 3, the transmission shaft support workpiece 3 to be milled is raised by the workpiece heightening seat 24 to adapt to the height of the milling cutter, the short positioning pin 25 is arranged on the workpiece heightening seat 24 and is matched with the end surface of the transmission shaft support workpiece 3 to position the position of the transmission shaft support workpiece 3.

[0036] The tool setting seat 26 is arranged on the fixture seat 2, the plug gauge 27 is fixed on the tool setting seat 26, the tool setting seat 26 and the plug gauge 27 are used to set the tool to ensure that the tool is in the correct position during machining.

[0037] The pneumatic clamping button 28 and the pneumatic release button 29 are arranged on the fixture seat 2, the pneumatic clamping button and the pneumatic release button are electrically connected with the two cylinder push rod mechanisms respectively to control the extension and retraction of the two cylinder push rod mechanisms.

[0038] The working mode is as follows:

[0039] The fixture is fixed on the horizontal milling machine workbench through the positioning key 30, the two transmission shaft support workpieces 3 are respectively arranged on the two heightening seat supports, the center through hole 4 is aligned with the short positioning pin 25, the transmission shaft support workpiece 3 is clamped and fixed by turning over the pressing plate 11, the two support pins are arranged below the two transmission shaft support workpieces 3 by pressing the pneumatic clamping button 28, and the support pin 16 is adjusted to the correct position by rotating the handle 23.

[0040] The milling cutter is aligned with the cutter block and plug gauge 27, the power switch is turned on, the workpiece 3 is clamped on the transmission shaft support, and the milling cutter starts to perform the milling operation, after the milling operation is completed, the pneumatic release button 29 is pressed, the piston rod of the pneumatic cylinder body 6 pulls the inclined wedge 7 to move backward on the sliding groove block 9, drives one end of the adjacent tangent pressing plate 11 to rotate upward around the support 10, the pressing plate 11 rotates upward, the clamping state of the two transmission shaft supports workpieces 3 is cancelled, the pressing plate 11 returns to the initial state through the action of the first spring 13, and the transmission shaft support workpiece 3 is taken out to complete the milling operation.

[0041] It can be understood that the above specific description of the utility model is only used for illustrating the utility model and is not limited to the technical scheme described in the utility model embodiment, and those skilled in the art should understand that the utility model can still be modified or replaced equivalently to achieve the same technical effect, as long as the use needs are met, which is within the protection scope of the utility model.

Claims

1. A special fixture for two-end-face face milling, comprising a base (1) and a fixture seat (2) arranged on the base (1), characterized in that, The base (1) and the clamp seat (2) jointly constitute a convex structure, the same structure of the cylinder push rod mechanism is arranged on the top surface of the clamp seat (2) and is arranged on the left and right sides, the rotating pressing plate (11) mechanism is arranged on the cylinder push rod mechanism, the cylinder push rod mechanism is matched with the corresponding rotating pressing plate (11) mechanism on the outer side, the end of the two rotating pressing plate (11) mechanisms facing the center of the clamp seat (2) is driven by the extension of the cylinder push rod mechanism, and the two transmission shaft support workpieces (3) are pressed and loosened, respectively, the through hole (4) is arranged on the top surface of the clamp seat (2) and corresponds to the two transmission shaft support workpieces (3), and the auxiliary supporting mechanism is arranged on the base (1) and corresponds to the two through holes (4), respectively, the auxiliary supporting mechanism can pass through the through hole (4) and be matched with the bottom surface of the transmission shaft support workpiece (3) to assist in supporting.

2. A special fixture for two end face horizontal milling according to claim 1, characterized in that, The cylinder push rod mechanism comprises a cylinder base (5), a cylinder body (6) and a wedge (7), the cylinder base (5) of one of the cylinder push rod mechanisms is provided with a cylinder heightening base (8) below, the cylinder heightening base (8) is connected to the clamp seat (2), the cylinder base (5) of the other cylinder push rod mechanism is directly connected to the clamp seat (2), the cylinder body (6) is fixed to the cylinder base (5), the wedge (7) is connected to the piston rod of the cylinder body (6), the wedge (7) is arranged in the sliding groove block (9) and can move along the groove of the sliding groove block (9), and the sliding groove block (9) is arranged on the cylinder base (5).

3. A special fixture for two end face horizontal milling according to claim 2, characterized in that, The rotating pressing plate (11) mechanism comprises a support (10), a pressing plate (11), a roller (12) and a first spring (13), the support (10) is arranged on the cylinder base (5), the pressing plate (11) is inverted L-shaped and is hinged to the middle of the support (10), the bent end of the pressing plate (11) corresponds to the upper side of the transmission shaft support workpiece (3), the other end is fixed with the roller (12), the roller (12) is matched with the wedge (7), the roller (12) is driven to rotate by the linear motion of the wedge (7) and drives the pressing plate (11) to rotate, and the two ends of the spring are connected with the cylinder base (5) and the pressing plate (11).

4. A special fixture for two end face horizontal milling according to claim 3, characterized in that, The rotating angle of the pressing plate (11) is at least 60°.

5. A special fixture for two end face horizontal milling according to claim 1, characterized in that, The auxiliary support mechanism comprises an auxiliary support seat (14), a screw cap (15), a support pin (16), a top pin (17), a second spring (18), a bushing (19), and a locking screw (20), the auxiliary support seat (14) is fixed on the base (1), the screw cap (15) is fixed on the bottom of the auxiliary support seat (14), the support pin (16) is in abutment with the bottom surface of the transmission shaft support workpiece (3) through the through hole (4), the two ends of the second spring (18) are connected with the top of the screw cap (15) and the bottom of the support pin (16) respectively, the side surface of the support pin (16) is provided with a slope type groove (21), the inner end of the top pin (17) extends into the slope type groove (21), the bushing (19) is fixed on the side surface of the auxiliary support seat (14), and the locking screw (20) is externally screwed into the auxiliary support seat (14) through the bushing (19) and is connected with the outer end of the top pin (17).

6. A special fixture for two end face horizontal milling according to claim 5, characterized in that, The outer end of the locking screw (20) is connected with a ball head (22), and the ball head (22) is provided with a handle (23).

7. A special fixture for two end face horizontal milling according to claim 1, characterized in that, A workpiece heightening seat (24) is arranged on the clamp seat (2) corresponding to the end surface of the two transmission shaft support workpieces (3), a short positioning pin (25) is arranged on the workpiece heightening seat (24), and the short positioning pin (25) is matched with the end surface of the transmission shaft support workpiece (3) and is used for positioning the position of the transmission shaft support workpiece (3).

8. A special fixture for two end face horizontal milling according to claim 1, characterized in that, A tool setting seat (26) is arranged on the clamp seat (2), and a plug gauge (27) is fixed on the tool setting seat (26).

9. A special fixture for two end face horizontal milling according to claim 1, characterized in that, A pneumatic clamping button (28) and a pneumatic release button (29) are arranged on the clamp seat (2), the pneumatic clamping button and the pneumatic release button are electrically connected with the two cylinder push rod mechanisms at the same time, and the extension and retraction of the two cylinder push rod mechanisms are respectively controlled.

10. A special fixture for two end face horizontal milling according to claim 1, characterized in that, Positioning keys (30) are arranged on the two sides of the base (1).

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