Punching tool for hardware workpiece machining

Abstract

The utility model relates to a punching tool for hardware workpiece machining, and belongs to the field of machining. Comprising a rack; the guide rail is arranged on the rack; the first clamping assembly is installed on the guide rail and slides along the guide rail, and the first clamping assembly is provided with a plurality of linear sliding modules and a plurality of rotary clamping modules; and the positioning assembly is arranged on the rack and used for positioning the moving distance of the linear sliding module, the positioning and mounting position of the workpiece and hole positioning. The clamping device is used for solving the technical problems that in the prior art, clamping force is not uniform due to manual control, or clamping precision deviation and hole location positioning deviation are caused by air pressure fluctuation of a clamping claw in the using process.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of machining, especially relates to a punching tool for hardware workpiece machining. BACKGROUND

[0002] The tool for processing special-shaped workpieces assists in positioning the workpieces to be processed and assisting in guiding the size of the processing part, and in the punching process of the special-shaped hardware workpieces in the prior art, a manual adjustment type clamping device with a screw block is often used because the full compliance of the material pressing die cannot be adopted due to the problems of production cost and efficiency, and in the batch production process, the clamping force is controlled by integrating a torque sensor and a servo motor.

[0003] Patent No. CN109226467B discloses a special-shaped workpiece punching tool and a punching method thereof, which comprises an upper die base plate, an upper die material pressing mechanism, a lower die base plate and a lower die material pressing mechanism, a stamping mechanism for punching and concave pressing is arranged on the upper die material pressing mechanism of the upper die base plate; the stamping mechanism comprises a vertical hydraulic cylinder arranged on the top of the upper die base plate, a stamping plate fixed to the end of the piston rod at the bottom of the hydraulic cylinder, and three punching columns fixed to the bottom of the stamping plate; the invention also discloses a special-shaped workpiece punching method: a1. fixing the workpiece on the lower die material pressing plate; a2. stamping three mounting holes and an arc inclined surface on the three protrusions of the workpiece; and a3. taking the processed workpiece off the lower die material pressing plate.

[0004] The prior art has at least the following problems in use:

[0005] The special-shaped workpiece is limited by the limiting block and fastened and positioned by the driving cylinder, and in the batch punching process, the clamping force is unevenly controlled by the manual control or the clamping precision is deviated and the positioning of the hole position is offset due to the pressure fluctuation and wear of the clamping claw in the use process. UTILITY MODEL CONTENTS

[0006] The utility model provides a punching tool for hardware workpiece machining for solving the technical problems that the clamping force is unevenly controlled by the manual control or the clamping precision is deviated and the positioning of the hole position is offset due to the pressure fluctuation of the clamping claw in the use process in the prior art.

[0007] In order to achieve the above purpose, the utility model realizes the following technical scheme:

[0008] The utility model provides a punch tooling for hardware workpiece processing, which comprises a rack, a guide rail arranged on the rack, a first clamping assembly installed on the guide rail and sliding along the guide rail, the first clamping assembly being provided with a plurality of linear sliding modules and a rotating clamping module, a positioning assembly arranged on the rack and used for positioning the moving distance of the linear sliding module, the positioning installation position of a workpiece and the positioning of a hole.

[0009] Further, the utility model also comprises a first support frame installed on the rack, the guide rail guiding a workpiece to a processing area along the first support frame, a second support frame installed on the rack and located above the first support frame, the guide rail guiding a punch die along the second support frame, and a plurality of reference blocks A distributed on the rack and used for assisting in fixing the installation position of the linear sliding module and the punch die.

[0010] Further, the tooling also comprises a second clamping assembly, which comprises a sliding block slidingly arranged on the guide rail on the second support frame, a plurality of positioning columns distributed on the sliding block and used for fixing and installing the punch die, and a reference block B installed on the sliding block and used for abutting against the reference block A on the second support frame to assist in positioning the processing position of the punch die.

[0011] Further, the utility model also comprises a reference block C installed on the linear sliding module, the reference block C being used for abutting against the reference block A on the first support frame.

[0012] Further, the positioning assembly comprises a reference block checking unit used for detecting the wear of the positioning surfaces of the reference block A, the reference block B and the reference block C, photographing the alignment holes of the three reference blocks and calculating the hole position deviation, a first positioning unit provided with a grating ruler and a pneumatic ejector pin, the grating ruler being laid along the guide rail and connected with the linear sliding module to collect the moving distance of the module in real time, the pneumatic ejector pin being installed beside a processing station of the first support frame and used for fine-tuning the position of a workpiece, and a second positioning unit provided with a guide piece and a displacement sensor, the guide piece being used for guiding the moving direction of a punch, and the displacement sensor being used for collecting the punch stroke.

[0013] Further, the tooling also comprises an auxiliary assembly, which comprises a plurality of detection units provided with an acquisition sensor and an indicator light, the acquisition sensor being used for acquiring the positioning condition of the reference block A, the reference block B and the reference block C, and the indicator light emitting an indication signal after the reference block A, the reference block B and the reference block C abut against each other.

[0014] The utility model provides a punch tooling for hardware workpiece processing, which comprises a rack, a guide rail arranged on the rack, a first clamping assembly installed on the guide rail and sliding along the guide rail, the first clamping assembly being provided with a plurality of linear sliding modules and a rotating clamping module, a positioning assembly arranged on the rack and used for positioning the moving distance of the linear sliding module, the positioning installation position of a workpiece and the positioning of a hole.

[0015] Through the positioning structure of the double support frame and the multi-reference block, high-precision alignment of the workpiece and the punching die is realized; through the cooperation of the reference block checking unit and the grating ruler, real-time monitoring and compensation of the positioning accuracy in the processing process are realized; through the pneumatic ejector pin fine adjustment and the three-color lamp indication, the workpiece clamping is convenient and the state is visualized; through the sealed guide and the high-precision displacement sensor, the punch stroke is accurately controlled, and the punching qualification rate is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 A plan view of the punching tool for hardware workpiece machining provided by the embodiment of the present application;

[0018] Figure 2 A front view of the punching tool for hardware workpiece machining provided by the embodiment of the present application;

[0019] Figure 3 A side view of the punching tool for hardware workpiece machining provided by the embodiment of the present application;

[0020] Figure 4 A Figure 1 An enlarged view of A1 in the figure;

[0021] Figure 5 A Figure 1 An enlarged view of B1 in the figure.

[0022] In the figure: 11 - rack; 12 - first support frame; 13 - second support frame; 21 - reference block A; 31 - guide rail; 411 - linear sliding module; 412 - rotating clamping module; 60 - positioning assembly; 61 - reference block checking unit; 62 - first positioning unit; 63 - second positioning unit; 421 - sliding block; 422 - positioning column; 423 - reference block B; 424 - reference block C; 71 - acquisition sensor; 72 - indicator light. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below with reference to the drawings.

[0024] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0026] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be welding, or bolted connection, or riveting; it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Embodiment:

[0028] As shown in Figures 1 to 5 The present embodiment provides a punching tool for hardware workpiece machining, comprising: a rack 11; a guide rail 31 arranged on the rack 11; a first clamping assembly installed on the guide rail 31 and sliding along the guide rail 31, the first clamping assembly having a plurality of linear sliding modules 411 and a rotating clamping module 412; a positioning assembly 60 arranged on the rack 11, used for positioning the moving distance of the linear sliding module 411 and the positioning and installation position of the workpiece and the hole positioning.

[0029] In the embodiment, the rack 11 is integrally cast by HT300 high-strength gray cast iron, the overall size is 2000mmx800mmx1200mm, the bottom is fixed on the workshop floor by 4 groups of M20 anchor bolts, a 5mm thick nitrile rubber shock pad is installed between the bolt and the floor, which can reduce the influence of processing vibration on positioning accuracy; the guide rail 31 selects THK SR series linear slide rail, the length of the rail is matched with the first support frame 12, the surface is treated by high-frequency quenching, high-temperature lubricating grease is applied between the slide rail and the slide block to ensure that the sliding resistance is less than or equal to 5N; the linear sliding module 411 of the first clamping assembly is processed by aluminum profile CNC, the bottom of the module is rigidly connected with the slide rail and the slide block by bolts, the carrying capacity of a single module is greater than or equal to 500kg, the rotating clamping module 412 is equipped with an SMC rotary cylinder, which can realize stepless rotation of 0-180°, the clamping jaw is quenched after being finely ground from 45# steel, and a 3mm thick polyurethane non-slip pad is pasted on the jaw surface to avoid clamping the surface of the workpiece; the installation support of the positioning assembly 60 is positioned by laser marking, and the perpendicularity error of the rack 11 is less than or equal to 0.02mm / m.

[0030] Further, it further comprises: a first support frame 12 mounted on the rack 11, the guide rail 31 guiding the workpiece to the machining area along the first support frame 12; a second support frame 13 mounted on the rack 11, and the second support frame 13 is located above the first support frame 12, the guide rail 31 guiding the punching die along the second support frame 13; a plurality of reference blocks A21 distributed on the rack 11, used to assist fixing the installation position of the linear sliding module 411 and the punching die.

[0031] In the embodiment, the first support frame 12 is a carbon steel welded frame structure, the frame cross-sectional size is 80mmx80mmx5mm, the surface is sprayed with epoxy resin anti-rust paint, and the top is connected with the guide rail 31 through a T-shaped groove; the second support frame 13 is positioned with the rack 11 through 4 groups of φ30 cylindrical pins, and then fastened by bolts, the distance between the bottom of the second support frame 13 and the top of the first support frame 12 is 600mm, which can adapt to workpiece machining with a height of less than or equal to 500mm; the reference block A21 is made of GCr15 bearing steel, the size of a single block is 50mmx50mmx30mm, the flatness error of the positioning surface is less than or equal to 0.005mm, and a total of 6 reference blocks A21 are provided, of which 4 are distributed on both sides of the first support frame 12, and 2 are arranged at the bottom of the second support frame 13, all the reference blocks A21 are fixed by welding after being positioned by pins, and the parallelism error between the positioning surface and the guide rail 31 is less than or equal to 0.01mm.

[0032] Further, the tooling further comprises a second clamping assembly, which comprises: a sliding block 421 slidingly arranged on the guide rail 31 on the second support frame 13; a plurality of positioning columns 422 distributed on the sliding block 421 for fixing and mounting the punching die; and a reference block B 423 mounted on the sliding block 421, the reference block B 423 being used for abutting the reference block A 21 on the second support frame 13 to assist in positioning the punching die in the machining position.

[0033] In the embodiment, the bottom of the sliding block 421 is connected to the slide rail slider of the second support frame 13 through a countersunk bolt, the side of the sliding block is provided with a stroke limiting block to prevent overtravel collision; the positioning column 422 is a φ20*50mm steel cylinder, and a total of four are arranged in a rectangular distribution, the positioning column 422 is in interference fit with the sliding block 421, and the top is provided with a 2mm chamfer to facilitate die positioning and mounting; the material and precision of the reference block B 423 are consistent with those of the reference block A 21, and the reference block B 423 is fixed to the sliding block 421 through two groups of internal hexagonal bolts, the positioning surface of the reference block B 423 is perpendicular to the sliding direction of the sliding block 421, and when the sliding block 421 moves to the machining position, the abutting clearance between the reference block B 423 and the reference block A 21 is ≤0.01mm.

[0034] Further, the tooling further comprises a second clamping assembly, which comprises: a sliding block 421 slidingly arranged on the guide rail 31 on the second support frame 13; a plurality of positioning columns 422 distributed on the sliding block 421 for fixing and mounting the punching die; and a reference block B 423 mounted on the sliding block 421, the reference block B 423 being used for abutting the reference block A 21 on the second support frame 13 to assist in positioning the punching die in the machining position.

[0035] In the embodiment, the structure parameters of the reference block C 424 are completely consistent with those of the reference block A 21, the reference block C 424 is fixed to the side of the linear sliding module 411 through laser welding, stress relief treatment is performed after welding, and the positioning surface is then finely ground; the perpendicularity error between the reference block C 424 and the linear sliding module 411 is ≤0.008mm, when the linear sliding module 411 drives the workpiece to move to the machining station, the reference block C 424 automatically abuts the reference block A 21 on the first support frame 12, the abutting state is detected through a magnetic force sensor after abutting, and the positioning reliability is ensured.

[0036] Further, the positioning assembly 60 comprises: a reference block checking unit 61 for detecting the wear amount of the positioning surface of the reference block A 21 and the reference blocks B 423 and C 424, for shooting the alignment holes of the three reference blocks, and for calculating the hole position deviation; a first positioning unit 62 having a grating ruler and a pneumatic ejector pin, the grating ruler being laid along the guide rail 31 and being connected with the linear sliding module 411 to collect the movement distance of the module in real time, and the pneumatic ejector pin being installed beside the machining station of the first support frame 12 to finely adjust the position of the workpiece; and a second positioning unit 63 having a guide and a displacement sensor, the guide being used for guiding the movement direction of the punch, and the displacement sensor being used for collecting the punching stroke.

[0037] In the present embodiment, the reference block checking unit 61 is equipped with a KEYENCE IM-7000 series image sensor, the sensor is mounted on the side of the rack 11 through a bracket, can shoot the wear marks of the reference block positioning surface, calculate the wear amount through image processing algorithm, at the same time shoot the φ8mm alignment hole of the three reference blocks, analyze the deviation of the hole center, the deviation detection range is ±0.1mm; the grating ruler of the first positioning unit 62 selects HEIDENHAIN LS487 series, the resolution is 0.1μm, the reading head is rigidly connected with the linear sliding module 411, the data is transmitted to the PLC in real time through the RS485 interface, the pneumatic ejector pin is SMCCDJ2B16-50 series, the front end of the ejector pin is φ5mm polyurethane head, the working pressure is 0.4-0.6MPa, the position fine adjustment range is ±0.5mm; the guide of the second positioning unit 63 is a tungsten steel guide sleeve, the guide sleeve is installed on the mold fixed plate through interference fit, the displacement sensor selects KEYENCE GT2-P12K, the measurement range is 0-12mm, the accuracy is ±0.002mm, the punch downward stroke is collected in real time and fed back to the control system.

[0038] Further, the tooling further comprises an auxiliary assembly, which comprises a plurality of detection units, each detection unit comprising a collection sensor 71 and an indicator light 72, the collection sensor 71 being configured to collect the positioning condition of the reference block A21, the reference block B423 and the reference block C424, and the indicator light 72 being configured to indicate the indication signal after the reference block A21, the reference block B423 and the reference block C424 abut.

[0039] In the present embodiment, each reference block interface corresponds to one sensor, and the sensor signal is connected to the PLC input module; the indicator light 72 is a 24V LED light, which is installed on the top of the tooling in a conspicuous position, and emits red light when the reference block is not docked, emits yellow light when the reference block is being docked, and emits green light when the fitting gap is less than or equal to 0.01mm, and at the same time, the buzzer emits a “beep” sound to prompt the operator to confirm the positioning state.

[0040] In summary, through the positioning structure of double support frames and multiple reference blocks, high-precision alignment of the workpiece and the punching die is achieved; through the cooperation of the reference block checking unit 61 and the grating ruler, real-time monitoring and compensation of the positioning accuracy during processing are achieved; through the pneumatic ejector pin fine adjustment and three-color light indication, the convenience and visualization of workpiece clamping are achieved; through the sealed guide and high-precision displacement sensor, the accurate control of the punch stroke is achieved, which effectively improves the punching qualification rate.

[0041] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or substitutions within the technical scope of the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A punching fixture for processing hardware workpieces, characterized in that, include: Rack (11); A guide rail (31) is provided on the frame (11); A first clamping assembly is mounted on the guide rail (31) and slides along the guide rail (31). The first clamping assembly has multiple linear sliding modules (411) and rotational clamping modules (412). A positioning component (60) is disposed on the frame (11) for positioning the moving distance of the linear sliding module (411), the positioning and installation position of the workpiece, and the hole positioning.

2. The punching fixture for processing hardware workpieces according to claim 1, characterized in that, Also includes: A first support frame (12) is mounted on the frame (11), and the guide rail (31) guides the workpiece to the processing area along the first support frame (12); The second support frame (13) is mounted on the frame (11) and is located above the first support frame (12). The guide rail (31) guides the punching die along the second support frame (13). Multiple reference blocks A (21) are distributed on the frame (11) to assist in fixing the installation position of the linear sliding module (411) and the punching die.

3. The punching fixture for processing hardware workpieces according to claim 2, characterized in that, The tooling also includes a second clamping assembly, which includes: A sliding block (421) is slidably disposed on the guide rail (31) on the second support frame (13); Multiple positioning posts (422) are distributed on the sliding block (421) for fixing and installing the punching die; Reference block B (423) is installed on the sliding block (421). Reference block B (423) is used to dock with reference block A (21) on the second support frame (13) to assist the punching die in positioning the processing position.

4. The punching fixture for processing hardware workpieces according to claim 3, characterized in that, Also includes: Reference block C (424) is mounted on the linear sliding module (411) and is used to dock with reference block A (21) on the first support frame (12).

5. A punching fixture for processing hardware workpieces according to claim 4, characterized in that, The positioning component (60) includes: The reference block verification unit (61) is used to detect the wear of the positioning surfaces of the reference block A (21), the reference block B (423), and the reference block C (424); The first positioning unit (62) has a grating ruler and a pneumatic ejector pin. The grating ruler is laid along the guide rail (31) and connected to the linear sliding module (411) to collect the moving distance of the module in real time. The pneumatic ejector pin is installed next to the processing station of the first support frame (12) for fine-tuning the position of the workpiece. The second positioning unit (63) has a guide and a displacement sensor. The guide is used to guide the movement direction of the punch, and the displacement sensor is used to collect the punching stroke.

6. The punching fixture for processing hardware workpieces according to claim 5, characterized in that, The work also includes auxiliary components, which include: Multiple detection units are provided, each having a data acquisition sensor (71) and an indicator light (72). The data acquisition sensor (71) is used to acquire the positioning status of the reference block A (21), the reference block B (423), and the reference block C (424). The indicator light (72) is used to indicate that the reference block A (21), the reference block B (423), and the reference block C (424) will emit an indication signal after they come into contact.

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