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CN-122007307-A - Cold header crankshaft slide block mechanism with buffer structure

CN122007307ACN 122007307 ACN122007307 ACN 122007307ACN-122007307-A

Abstract

The invention discloses a cold header crankshaft slide block mechanism with a buffer structure, which is characterized in that: the novel sliding block comprises a front sliding block and a rear sliding block, and a buffer structure is arranged between the front sliding block and the rear sliding block. The front sliding block is movably connected with the rear sliding block through an adjusting nut, and the adjusting nut is fixed by a locking nut after the position is fixed. The buffer structure can be a spring, the buffer structure can be composed of a plunger, oil and gas, the buffer structure can be composed of a plunger, a piston, oil and gas, the buffer structure can be composed of a plunger, oil and gas, and the buffer structure can be composed of a plunger, a spring, oil and gas. After the buffer structure is arranged between the two sliding blocks, the rear sliding block pushed by the crankshaft connecting rod quickly impacts the front sliding block for clamping the blank, so that a strong upsetting force is generated on the blank, and the blank is formed. The effect is more accurate, reliable, efficient and safe.

Inventors

  • XU JIAFENG
  • SHI LIWEI
  • ZHANG KAIFENG

Assignees

  • 思进智能成形装备股份有限公司

Dates

Publication Date
20260512
Application Date
20260310

Claims (9)

  1. 1. The cold header crankshaft sliding block mechanism with the buffer structure is characterized by comprising a front sliding block (1) and a rear sliding block (2), wherein the buffer structure is arranged between the front sliding block (1) and the rear sliding block (2).
  2. 2. The cold header crankshaft slide block mechanism with the buffer structure of claim 1, wherein the front slide block (1) and the rear slide block (2) are movably connected through an adjusting nut (3), and the adjusting nut (3) is fixed by a locking nut (4) after the position is fixed.
  3. 3. The cold header crankshaft slide block mechanism with the buffer structure according to claim 1, wherein the buffer structure is a spring (5), one end of the spring (5) props against the front slide block (1), and the other end of the spring (5) props against the rear slide block (2).
  4. 4. The cold header crankshaft slide block mechanism with the buffer structure of claim 1, wherein the buffer structure consists of a plunger (6), oil (7) and gas (8).
  5. 5. The cold header crankshaft slide block mechanism with the buffer structure of claim 1, wherein the buffer structure consists of a plunger (6), a piston (9), oil (7) and gas (8).
  6. 6. The cold header crankshaft slide block mechanism with the buffer structure of claim 1, wherein the buffer structure consists of a plunger (6), oil (7) and an air bag (16).
  7. 7. The cold header crankshaft slide block mechanism with the buffer structure of claim 1, wherein the buffer structure consists of a plunger (6), a spring (5), oil (7) and gas (8).
  8. 8. The cold header crankshaft slide block mechanism with the buffer structure according to claims 3 to 7 is characterized in that an inner cavity (17) for placing the buffer structure is arranged on the rear slide block (2).
  9. 9. The cold header crankshaft slide block mechanism with the buffer structure of claim 8, wherein gas (8) is placed at the bottom of the inner cavity, and oil (7) is in partial contact with the plunger (6).

Description

Cold header crankshaft slide block mechanism with buffer structure Technical Field The invention relates to the technical field of machine manufacturing, in particular to a cold header crankshaft sliding block mechanism with a buffer structure. Background The cold header is special equipment which is used for forging and forming the top of a bar or a wire rod in a thickening mode at room temperature and mainly used for mass production of fasteners such as nuts and bolts. The processing steps of the cold header generally comprise feeding, cutting, forming, discharging and the like, wherein the total power source is a motor, and most of mechanical actions are to provide split power through different crankshaft slide block mechanisms. The crankshaft slide block mechanism is a plane four-bar mechanism consisting of a crank, a connecting rod and a slide block, and the interconversion of rotary motion and reciprocating linear motion is realized through a revolute pair and a shifting pair. At present, when processing high-elasticity materials, high-hardness materials or parts with limited processing speed, hydraulic presses are often adopted to process so as to ensure the forming quality, and the productivity of the hydraulic presses is influenced by the working frequency of electromagnetic valves, the working stroke and the retracting stroke determined by the product length, the flow rate and the pressure of a hydraulic system and the like, and the productivity is low, and is usually about 10 parts per minute. The productivity of the cold header is high, and is generally more than 100 pieces per minute. The productivity of the cold header is improved by about 10 times compared with the productivity of the hydraulic press for parts which can be produced by both devices. When the hydraulic press is used for producing products, the working speed is convenient to adjust, the blank is fast-forwarded in idle stroke, then is fast-forwarded in working mode, and is gradually increased in pressure after being contacted with the blank, and the blank is slowly and uniformly deformed, so that the hydraulic press is suitable for pressure forming of various materials. The cold header works according to the given crankshaft slide block mechanism, the working stroke and the returning stroke have the same time, and the difference of fast forward, working forward and fast return does not exist, and when the working stroke is carried out, the speed is changed from fast to slow, and the blank is quickly impacted to move and be pressed and deformed, and the speed is changed to 0 when the working stroke is near the end. The impact speed depends on the rotation speed, stroke and length of the blank of the selected cold header, and under the condition that other conditions are not changed, the longer the blank is, the larger the impact speed is, the shorter the blank is, the slower the impact speed is, and the speed is 0 near the end. The initial speed sensitive material or the speed limited stamping process is not suitable for cold heading. Because the cold heading production can greatly improve the productivity, how to simulate the stamping process of a hydraulic press on a cold heading machine to blanks, namely contact, gradual pressing and powerful press forming, is suitable for forming sensitive materials, and is a key for improving the productivity by using the cold heading machine to produce instead of using the hydraulic press. Disclosure of Invention The invention aims to provide a cold header crankshaft sliding block mechanism with a buffer structure, which solves the problems in the background technology. In order to solve the technical problems, the cold header crankshaft slide block mechanism with the buffer structure is realized through the following technical measures and is characterized by comprising a front slide block and a rear slide block, wherein the buffer structure is arranged between the front slide block and the rear slide block. As an improvement of the invention, the front sliding block and the rear sliding block are movably connected through an adjusting nut, and the adjusting nut is fixed by a locking nut after the position is fixed. The design is selected to have the purposes that both ends of an adjusting stud are provided with external threads, one end of the adjusting stud is in threaded connection with a front sliding block, the other end of the adjusting stud is in threaded connection with an adjusting nut, the middle section of the adjusting stud is a polished rod, and the rear sliding block can move along the polished rod of the adjusting stud. As an improvement of the invention, the buffer structure is a spring, one end of the spring props against the front sliding block, and the other end of the spring props against the rear sliding block. The design is selected to generate a distance between the front slide block and the rear slide block by using the spring forceIs stopped when the front slider co