CN215587509U

CN215587509U - Cold forming device for cam rotating shaft part for vehicle

Info

Publication number: CN215587509U
Application number: CN202023293279.7U
Authority: CN
Inventors: 金烨炯; 陈巍
Original assignee: SHANGHAI SQB AUTOMOTIVE FASTENERS Ltd
Current assignee: SHANGHAI SQB AUTOMOTIVE FASTENERS Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-01-21
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to the field of metal extrusion forming tools, in particular to a cold forming device for a cam rotating shaft part for a vehicle. The cold forming device for the cam rotating shaft part for the vehicle comprises a main die (1), and is characterized in that: the main die (1) is internally provided with an inner hole (11) penetrating through the front end face and the rear end face, the inner hole (11) is a three-stage stepped hole, the inner hole (11) is sequentially provided with a front hole (111), a middle hole (112) and a rear hole (113) from the front end face to the rear end face, the cross section of the front hole (111) is circular, and the cross sections of the middle hole (112) and the rear hole (113) are both arc-shaped formed by a major arc and a corresponding chord; both the copying clamp (3) and the copying anvil (4) are rotatably provided on one side of the master mold (1). The utility model improves the rate of finished products and reduces the cost.

Description

Cold forming device for cam rotating shaft part for vehicle

Technical Field

The utility model relates to the field of metal extrusion forming tools, in particular to a cold forming device for a cam rotating shaft part for a vehicle.

Background

The vehicle cam rotary shaft 5 is shown in fig. 1 and 2: the cam comprises a cam 51 at the head and a rod 52 at the rear, the cross sections of the cam 51 and the rod 52 are both arc-shaped, a common processing technological process is to mill a flat plane after cold heading, the plane in the same direction needs to be milled at the cam and the rod during machining after cold heading forming in the processing technological process, meanwhile, the bearing surface of the head cannot be damaged during milling of the rod, the processing difficulty is high, the efficiency is low, the product percent of pass is low, the manufacturing cost is increased, and the development requirement of increasing the market demand of cam rotating shaft products is difficult to adapt.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a cold forming device for a cam rotating shaft part for a vehicle, aiming at overcoming the defects of the prior art and providing cold extrusion equipment which can improve the processing efficiency and the yield, improve the material utilization rate and reduce the cost.

The utility model achieves the purpose by the following technical scheme:

the cold forming device for the cam rotating shaft part for the vehicle comprises a main die and is characterized in that: also comprises a punching die, a profiling clamp and a profiling anvil,

the main die is an inner hole cavity die, an inner hole penetrating through a front end face and a rear end face is arranged in the main die, the inner hole is a three-stage stepped hole, the inner hole is sequentially provided with a front hole, a middle hole and a rear hole from the front end face to the rear end face, the cross section of the front hole is circular, the cross sections of the middle hole and the rear hole are both arcs formed by major arcs and corresponding chords, the diameter of the circular cross section of the front hole is set to be a, the diameter of a circle where the arc cross section of the middle hole is located is b, the diameter of a circle where the arc cross section of the rear hole is located is c, then a is larger than b and c, the central axis of the front hole is coincident with the axis formed by corresponding circle centers of the arc cross sections of the middle hole and the rear hole, and the planes corresponding to the arc cross sections of the middle hole and the rear hole are on the same plane;

the cross section of the punch die is circular, if the outer diameter of the punch die is d, a is larger than d and larger than b, the punch die is movably arranged on one side of the main die, and the front end of the punch die is opposite to the front hole;

the profiling clamp and the profiling anvil are both rotatably arranged on one side of the main die, a clamping groove is formed in the lower portion of the profiling clamp, a clamping groove is formed in the lower portion of the clamping groove profiling clamp, the cross section of the clamping groove is triangular, a clamping face is arranged on the lower portion of the profiling anvil, the clamping face is a plane, the clamping groove is opposite to the clamping face, the clamping groove and the clamping face are respectively arranged on two sides of the front end face of the main die, the clamping groove is formed in one side of the arc face of the middle hole, and the clamping face is arranged on one side of the plane of the middle hole.

The cold forming device for the cam rotating shaft part for the vehicle is characterized in that: a =1.5c, b =1.05c, d =1.45 c.

When the utility model is used, the method is implemented according to the following steps in sequence:

inserting a section to be formed into a front hole of a main die, pushing a stamping die forwards, sequentially pushing the section into a middle hole and a rear hole, carrying out extrusion forming to obtain the automotive cam rotating shaft, withdrawing the stamping die after forming, arranging an ejection rod top in the main die, ejecting the automotive cam rotating shaft by the ejection rod, rotating the copying clamp and the copying anvil in opposite directions at the moment, clamping the automotive cam rotating shaft between a clamping groove and a clamping surface, respectively tangent to two inclined surfaces of the clamping groove and the arc-shaped surface of the automotive cam rotating shaft, and tangent to the plane of the automotive cam rotating shaft, thus clamping the automotive cam rotating shaft to the next station.

According to the utility model, the round rod wire is formed to the size of the flat pin rod through the flat forming die at one time, and the flat product is correctly transferred among stations in each sequence through the profiling clamp and the profiling anvil (4).

The utility model has the following beneficial effects: subsequent milling processing is omitted in one-step forming, machining efficiency is high, material utilization rate is high, product qualification rate is high, and manufacturing cost is effectively reduced.

Drawings

Figure 1 is a front view of a vehicular cam shaft,

figure 2 is a cross-sectional view taken along line a-a of figure 1,

FIG. 3 is a schematic sectional view in a front view direction of the master mold and the die in the extrusion molding of the present invention,

FIG. 4 is a schematic view of a profiling jaw and profiling anvil of the present invention.

Detailed Description

The utility model is further illustrated by the following specific examples.

Example 1

The cold forming device for the cam rotating shaft part for the vehicle comprises a main die 1 and is characterized in that: also comprises a punch die 2, a copying clamp 3 and a copying anvil 4,

the main die 1 is an inner hole cavity die, an inner hole 11 penetrating through a front end face and a rear end face is arranged in the main die 1, the inner hole 11 is a three-stage stepped hole, the inner hole 11 sequentially comprises a front hole 111, a middle hole 112 and a rear hole 113 from the front end face to the rear end face, the cross section of the front hole 111 is circular, the cross sections of the middle hole 112 and the rear hole 113 are both arcs formed by a major arc and corresponding chords, the diameter of the circular cross section of the front hole 111 is a, the diameter of the arc cross section of the middle hole 112 is b, the diameter of the arc cross section of the rear hole 113 is c, a > b > c, the central axis of the front hole 111 and the axis formed by the corresponding circle centers of the arc cross sections of the middle hole 112 are mutually overlapped, and the planes corresponding to the arc cross sections of the middle hole 112 and the rear hole 113 are on the same plane;

the cross section of the punch die 2 is circular, if the outer diameter of the punch die 2 is d, a is larger than d and larger than b, the punch die 2 is movably arranged on one side of the main die 1, and the front end of the punch die 2 is opposite to the front hole 111;

the copying clamp 3 and the copying anvil 4 are both rotatably arranged on one side of the main die 1, a clamping groove 31 is arranged at the lower part of the copying clamp 3, the cross section of the clamping groove 31 is triangular, a clamping surface 41 is arranged at the lower part of the copying anvil 4, the clamping surface 41 is a plane, the clamping groove 31 is over against the clamping surface 41, the clamping groove 31 and the clamping surface 41 are respectively arranged on two sides of the front end face of the main die 1, the clamping groove 31 is arranged on one side of the arc face of the central hole 112, and the clamping surface 41 is arranged on one side of the plane of the central hole 112.

The cold forming device for the cam rotating shaft part for the vehicle is characterized in that: a =1.5c, b =1.2c, d =1.45 c.

inserting a section to be formed into a front hole 111 of a main die 1, pushing a stamping die 2 forwards, sequentially pushing the section into a middle hole 112 and a rear hole 113, extruding and forming to form the automotive cam rotating shaft 5, withdrawing the stamping die 2 after forming, arranging an ejection rod top in the main die 1, ejecting the automotive cam rotating shaft 5 by the ejection rod, rotating a profiling clamp 3 and a profiling anvil 4 oppositely at the moment, clamping the automotive cam rotating shaft 5 between a clamping groove 31 and a clamping surface 41, respectively cutting two inclined surfaces of the clamping groove 31 into tangency with arc-shaped surfaces of the automotive cam rotating shaft 5, cutting the clamping surface 41 into tangency with a plane of the automotive cam rotating shaft 5, and thus clamping the automotive cam rotating shaft 5 to a next station.

Claims

1. The cold forming device for the cam rotating shaft part for the vehicle comprises a main die (1), and is characterized in that: also comprises a punch die (2), a profiling clamp (3) and a profiling anvil (4),

the main die (1) is an inner hole cavity die, an inner hole (11) penetrating through a front end face and a rear end face is arranged in the main die (1), the inner hole (11) is a three-stage stepped hole, the inner hole (11) sequentially comprises a front hole (111), a middle hole (112) and a rear hole (113) from the front end face to the rear end face, the cross section of the front hole (111) is circular, the cross sections of the middle hole (112) and the rear hole (113) are all arc-shaped formed by a major arc and corresponding chords, the diameter of the circular cross section of the front hole (111) is set to be a, the diameter of the circle where the arc-shaped cross section of the middle hole (112) is located is set to be b, and the diameter of the circle where the arc-shaped cross section of the rear hole (113) is set to be c, a > b > c, the central axis of the front hole (111) and the axis formed by the corresponding circle centers of the cross section arches of the middle hole (112) are coincident with each other, and the planes corresponding to the cross section arches of the middle hole (112) and the rear hole (113) are on the same plane;

the cross section of the punch die (2) is circular, if the outer diameter of the punch die (2) is d, a is larger than d and larger than b, the punch die (2) is movably arranged on one side of the main die (1), and the front end of the punch die (2) is just opposite to the front hole (111);

the copying clamp (3) and the copying anvil (4) are rotatably arranged on one side of the main die (1), a clamping groove (31) is formed in the lower portion of the copying clamp (3), a clamping groove (31) is formed in the lower portion of the clamping groove (31) of the copying clamp (3), the cross section of the clamping groove (31) is triangular, a clamping face (41) is arranged on the lower portion of the copying anvil (4), the clamping face (41) is a plane, the clamping groove (31) is opposite to the clamping face (41), the clamping groove (31) and the clamping face (41) are respectively arranged on two sides of the front end face of the main die (1), the clamping groove (31) is arranged on one side of the arc face of the middle hole (112), and the clamping face (41) is arranged on one side of the plane of the middle hole (112).

2. The cold forming device for the vehicle cam rotor shaft part according to claim 1, wherein: a =1.5c, b =1.05c, d =1.45 c.