Rapid clamping device for cutting knife of steel ball cold header

Abstract

A rapid clamping device for a steel ball cold header cutter comprises a bottom frame, and driving rods are installed on the front portion and the rear portion of the bottom frame and driven by a driving device to rotate synchronously. The multiple groups of paired sliding plates are in threaded connection with the driving rod, and when the driving rod rotates, each group of paired sliding plates are relatively close to or far away from each other; a plurality of sets of connecting rods are fixed to the sliding plate in the length direction, each set of connecting rods penetrate through the guide groove of the positioning base and are connected with the clamping plate, and the material cutter is arranged on the positioning base and clamped through the clamping plate. According to the rapid clamping device for the cutting knife of the steel ball cold header, efficiency can be improved, and cost can be saved.

Description

Technical Field

[0001] The utility model relates to a blanking knife of a cold heading machine, in particular to a quick clamping device for a blanking knife of a steel ball cold heading machine. Background Art

[0002] The blanking knife of the cold heading machine for steel ball processing cuts the blank (steel wire) after being conveyed forward through a crank-slider mechanism, and clamps the blank and moves it to the upsetting station. After the blanking knife is used for a period of time, grooves are easily formed on the end face, and the grooves are likely to affect the cutting. Therefore, the end face needs to be polished.

[0003] The patent "A fixture for grinding a blanking knife of a cold heading machine" with the application number "202021112214.5" can fix multiple blanking knives at the same time. However, this device can only fix the blanking knives in one row at a time, and multiple sets of cylinders need to be arranged for each blanking knife to drive and tighten, increasing the cost. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a quick clamping device for a blanking knife of a steel ball cold heading machine, which can fix multiple groups and columns of blanking knives at one time, without using a driving device or only using a set of driving motors, not only has high clamping efficiency, but also saves costs.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A quick clamping device for a blanking knife of a steel ball cold heading machine includes a chassis, on which driving rods are installed front and back, and the driving rods are driven to rotate synchronously through a driving device; multiple pairs of sliding plates are threadedly connected to the driving rods, and when the driving rods rotate, each pair of sliding plates approaches or moves away from each other; a plurality of groups of connecting rods are fixed on the sliding plates along the length direction, each group of connecting rods passes through the guiding grooves of the positioning seats and is connected to the clamping plates, and the blanking knives are placed on the positioning seats and clamped by the clamping plates.

[0007] Positive rotation thread sections and reverse rotation thread sections are alternately arranged on the driving rods, and one of the sliding plates in a pair of sliding plates is threadedly connected to the positive rotation thread section and the other sliding plate is threadedly connected to the reverse rotation thread section.

[0008] The driving device includes a chain transmission mechanism, the sprockets of the chain transmission mechanism are coaxial with the driving rods, and one of the sprockets is driven by a motor; alternatively, the sprockets of the chain transmission mechanism are driven by a handwheel.

[0009] Rollers are provided at the bottom ends of the sliding plates, and the lower edges of the rollers are in contact with the upper end surfaces of the cross beams of the chassis.

[0010] The utility model provides a quick clamping device for a blanking knife of a steel ball cold heading machine, which has the following technical effects:

[0011] 1), By adopting two groups of driving rods with positive and negative threads, the two groups of driving rods are driven to rotate synchronously through a chain transmission mechanism. Since there are multiple groups of positive and negative threads, multiple pairs of sliding plates threadedly connected to the driving rods can be driven to move relatively closer or farther away. And multiple groups of clamping plates are arranged on each pair of sliding plates, so that multiple groups of clamping plates can be driven to clamp synchronously, thereby realizing the clamping of multiple sets of cutting knives. For example, in this embodiment, the clamping of 16 groups of cutting knives can be achieved at one time, which is simple and fast.

[0012] 2), The two groups of driving rods are driven by a chain transmission mechanism. The chain transmission mechanism only requires one motor to achieve automatic clamping, that is, the present application only needs one place of driving to achieve the clamping of all clamping stations. Compared with the patent "A fixture for grinding the cutting knife of a cold heading machine" with the application number "202021112214.5", the cost of purchasing cylinders can be saved. Brief Description of the Drawings

[0013] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0014] Figure 1 It is a schematic structural diagram of the present utility model.

[0015] Figure 2 It is a schematic diagram of the present utility model after clamping the cutting knife.

[0016] Figure 3 It is a top view of the present utility model.

[0017] Figure 4 It is a schematic diagram of the partial structure of the present utility model.

[0018] Figure 5 It is a schematic diagram of the structure of a pair of sliding plates in the present utility model.

[0019] Figure 6 It is a schematic diagram of the structure of the positioning seat in the present utility model.

[0020] Figure 7 It is a schematic diagram of the clamping plate clamping the cutting knife in the present utility model.

[0021] Figure 8 It is a schematic diagram of the separation of the clamping plate and the cutting knife in the present utility model.

[0022] Figure 9 It is a schematic diagram of the connection between the sliding plate and the driving rod in the present utility model.

[0023] In the figure: chassis 1, driving rod 2, sliding plate 3, connecting rod 4, positioning seat 5, guiding groove 6, clamping plate 7, cutting knife 8, chain transmission mechanism 9, roller 10, positive thread section 2.1, reverse thread section 2.2. Detailed Description of the Embodiment

[0024] As Figures 1-5 shown, a quick clamping device for a cutting tool of a steel ball cold heading machine includes a chassis 1, which is composed of an outer frame and a cross beam inside. A driving rod 2 is installed on the chassis 1 before and after through a bearing assembly, and the two driving rods 2 are arranged in parallel. A chain transmission mechanism 9 is installed at one end of the two driving rods 2, and the sprocket of the chain transmission mechanism 9 is coaxial with the corresponding driving rod 2. One of the sprockets is driven by a motor or by a handwheel or a handle.

[0025] The structures of the two driving rods 2 are the same, and a positive rotation thread section 2.1 and a reverse rotation thread section 2.2 are alternately arranged on the two driving rods 2. Figure 4 There are four pairs of sliding plates 3 threadedly connected to the driving rod 2. And in each pair of sliding plates 3, one sliding plate 3 is threadedly connected to the positive rotation thread sections 2.1 on the two driving rods 2 at both ends; the other sliding plate 3 is threadedly connected to the reverse rotation thread sections 2.2 on the two driving rods 2 at both ends. In this way, when the two driving rods 2 rotate synchronously, each pair of sliding plates 3 can move closer or farther away. By reasonably setting the positions of the four pairs of sliding plates 3, when the two driving rods 2 rotate synchronously, the four pairs of sliding plates 3 can act synchronously to clamp or release the cutting tool 8 by the clamping plate 7.

[0026] A plurality of groups of connecting rods 4 ( Figure 4 four groups in the figure) are fixed on the sliding plate 3 along the length direction, and each group of connecting rods 4 has four. Each group of connecting rods 4 passes through the guiding groove 6 of the corresponding positioning seat 5 and is connected to the clamping plate 7. The upper and lower end faces of the positioning seat 5 are in contact with the clamping plate 7 and the sliding plate 3 respectively, so that the positioning seat 5 is limited up and down. A protrusion and a cylinder matching the cutting tool 8 are provided on the positioning seat 5, the protrusion matches the groove of the cutting tool 8, and the cylinder is aligned with and matches the mounting hole of the cutting tool 8. The cutting tool 8 is limited front, back, left and right on the positioning seat 5. Then it is clamped by the clamping plate 7 moving closer left and right.

[0027] Three groups of rollers 10 are provided at the bottom end of each sliding plate 3, and the lower edges of the three groups of rollers 10 are in contact with the upper end faces of the corresponding three cross beams on the chassis 1. By providing the rollers 10, it is convenient for the sliding plate 3 to move and can play a supporting role at the same time, providing a better support for the later grinding wheel to press down and polish.

[0028] Working principle and process: Place a plurality of cutting tools 8 on the positioning seat 5, and then drive the two driving rods 2 to rotate synchronously in an electric or manual manner. In this way, the left sliding plate 3 and the right sliding plate 3 in the four pairs of sliding plates 3 move closer, and each pair of sliding plates 3 drives the four groups of clamping plates 7 above to move closer, thereby clamping the cutting tools 8 on the left and right, so as to realize synchronous clamping of the array of cutting tools 8.

Claims

1. A quick clamping device for cutting blades of a steel ball cold heading machine, characterized in that: The invention comprises a base frame (1), on which driving rods (2) are mounted at the front and rear ends, and the driving rods (2) are driven to rotate synchronously by a driving device; a plurality of pairs of sliding plates (3) are threadedly connected to the driving rods (2), and when the driving rods (2) rotate, each pair of sliding plates (3) moves closer to or farther from each other; a plurality of groups of connecting rods (4) are fixed on the sliding plates (3) along the length direction, and each group of connecting rods (4) passes through a guide groove (6) of a positioning seat (5) and is connected to a clamping plate (7); a cutting knife (8) is placed on the positioning seat (5) and clamped by the clamping plate (7).

2. The quick clamping device for cutting blades of a steel ball cold heading machine according to claim 1 is characterized in that: The driving rod (2) is alternately provided with forward-spinning thread segments (2.1) and reverse-spinning thread segments (2.2); one of the paired sliding plates (3) is threadedly connected to the forward-spinning thread segment (2.1), and the other sliding plate (3) is threadedly connected to the reverse-spinning thread segment (2.2).

3. The quick clamping device for cutting blades of a steel ball cold heading machine according to claim 1 is characterized in that: The driving device comprises a chain conveying mechanism (9), wherein the sprockets of the chain conveying mechanism (9) are coaxial with the driving rod (2), and one of the sprockets is driven by a motor; or, the sprockets of the chain conveying mechanism (9) are driven by a hand wheel.

4. The quick clamping device for cutting blades of a steel ball cold heading machine according to claim 1 is characterized in that: A roller (10) is provided at the bottom end of the sliding plate (3), and the lower edge of the roller (10) contacts the upper end surface of the crossbeam of the bottom frame (1).

Images